The big difference between us and the other teams you mentioned is that we have a depth of very fine younger players, not just in the first team squad but also bubbling underneath. These players are struggling a bit with the quality of the premier but they will be a year older and a season more experienced and, imo, will stand out in the championship. Add in a few senior players such as Coleman, Bolasie, Funes Mori, hopefully Barkley, all of who we have missed terribly this season, plus the likes of Gana, Keane, and one or two other good pros who will go into the season with the right attitude. I think we'll dominate the division. I'd have Coleman as captain. I'd ditch Jags, Williams, Baines, Martina, Stek, Rooney, Macca, Schneids, Lennon, Mirallas and see if we can also cut our losses on Siggy & Klaassen too.
I also don't think your scenario is necessarily what happens when "Big Clubs" get relegated. Not sure what you refer to as big clubs but last time United went down they came straight back up the following season. Same too with City, Spurs and Chelsea. Both times Newcastle were relegated recently they came straight back up as champions. West Ham have been relegated 3 times in the last 20 years. They came straight back up twice and the other time it took 2 years but they reached the play off final the first year. Even Sunderland, who are struggling this year, have a record of coming straight back up.
That leaves us with Leeds and Villa. Leeds were in financial meltdown when they were relegated. Villa is the one club on which you base your argument. And no way do I think it will take us 10 years to rebuild mate. Not when we have 7 players in the England U21 squad.
Hopefully we won't get relegated this year so our different opinions are not put to the test.