In my opinion, the bold part does look very negative bit it can also be seen as a positive. I think he does have a plan, that plan is to be flexible with the squad and tactics. It may have been accentuated by necessity at times but I believe that we have a manger who does not have one way of playing. This can then look like there is no concerted effort to get the right players in but hopefully we can, over the next couple of seasons get players in that can effectively play a couple of systems that will keep opposition guessing.
Every summer is huge for 95% of teams so I don't think this should be a negative either, talking about Villa, if/when they lose Grealish who are they going to get to replace him, it is a big decision, they could go for one big signing or they could go for a few smaller signings to build on what they have but all in all it is a massive decision that will determine if they improve/stagnate/decline. Same with Leeds, they have a few important players who could potentially leave so it is imperative that they either keep them or replace them well. West Ham/Leicester all have big decisions to make on either keeping/replacing massively important players and/or improving on what they already have, clear plan or not.
I am not overly worried about Villa, or anybody else improving more than us. If it happens fair play to them but it is not as cut and dried as saying that they have a clear plan and therefore we are going to be awful next season and they are going to keep on improving.