Forgive me if I've misunderstood you, but your post seems to answer the question 'how will the UK be better off outside the EU?' with the answer, 'no idea, we'll have to wait and see'. If that's the case, and you presumably voted Leave, why the hell did you vote Leave?
That's a genuine question by the way, I'm not trying to be sarcastic. The majority of people I know who voted Leave did so b/c of some vague 'make Britain great again' fantasy, but when pressed can't really give a logical answer.
My take on this is that you're right, it's impossible to clearly define how leaving the EU will be good for the UK, therefore it's a massive gamble, and one which will affect younger people more than retirees.
Fair post, and I'll give you my response. I guess you're fairly new to this thread, so I'll preface this by saying I've explained this before. Forgive what might turn out to be a fairly long post.
I am one of those who was in their twenties in the 1970s, when the whole matter of the UK joining the Common Market was finally resolved with our entry (we had tried to join on many occasions before, but De Gaulle kept saying 'Non!'). So in the 1970s we joined what was then a community whose aims were beneficial trading for the member states.
Over a period of decades, that trading union gradually became a political union, which is a complete step-change away from what was presented to us in the 1970s, and on which we ultimately voted (the trading union, that is, not the political union).
Additionally, our legal system became subsumed to the European legal system which, again, was never presented to us in the 1970s. I believe our judiciary should be free from outside interference when making judgement on matters that wholly pertain to the UK.
At this point I will mention again, which has been mentioned previously in this thread, that I was a civil servant for several decades, rising to a Management grade, and worked on secondment to Headquarters on several different projects over the years. I saw not only the inside working of our UK Government, but also the impositions placed upon it with regard to the legislation which it tried to implement, on occasions direct intervention and being told what we could and could not do. I cannot disclose what those things were, since I am bound by the Official Secrets Act until I die (yes, that is the scope of that Act), and if I were to do so, then if reported back, I would lay myself open to prosecution, which I am not prepared to do. However, I will say that I did not like a fair bit of what I saw when on secondment - it was a real eye-opener.
As far as the military goes, I am a member of a local aviation club that has monthly speakers. One recent speaker was from RAF Marham, an important base in RAF fighter-bomber operations right up to present. At the end of his talk questions inevitably turned to the 'EU Army' scenario, which subject had been mooted for some time. He was very circumspect, and said he could not speak on a lot of the questions put to him, and could not be quoted on them, but he did nod or shake his head to them. When I have mentioned this previously in this thread I have been shot down (no pun intended!) and ridiculed when the matter of the UK armed forces being totally subsumed to a EU army taking direct, non-negotiable orders from military personnel in EU countries (not only the 'big' EU states military personnel) was pointed out. I came away from that meeting with a far clearer view of matters than anything that has been put out by the media up to then, and since. I am certainly NOT anti the military of any of the EU countries (roydo and a couple of others know the reason why, but I will never state it in public forum).
A couple of other things that caught my attention. Something that was not given a great deal of attention, was the fact that the EU gave a loan to Ford to move a part of their operation from the UK to Turkey (a non-EU country). Is this how the EU acts towards one of its own members? Secondly, when the Port Talbot steelworks was in real financial difficulty, it transpired that the UK Government first had to ask permission from the EU in order to be able to provide ANY financial assistance. WE had to ask THEM for permission! I looked at these two things and thought that the EU involvement/interference is not what I want from an organisation that the UK is part of.
I considered all of the above, and came to the conclusion that my children's and my grandchildren's generations would be better away from this all-encompassing organisation. I considered that after joining we have been duped by our own Government(s) over the decades from the 1970s onwards, and the EU has over time has exerted an increasing and oppressive hold over the UK. I did not believe the best way forward for the UK was to be part of this union, which presently is 28 states (ourselves included), and seeks to increase the numbers in the future. I believe we would be fooling ourselves if we believe we exert any major pressure on the decision-making process within that union.
For the reasons given above, I decided to vote 'Leave'. I am not a UK-cented bigot, not a racist, not a 'Little Englander' (some of the slurs that those who voted 'Leave' have been called in this thread). I think for myself and make my own decisions.
I hope the foregoing explains things in depth for you.