The thing is, you can play whatever you want. But you do have a choice: You can ignore the numbers or you can embrace them. Either way is valid. The choice is yours.
ANY power set pairing with a good build and a competent player can solo at LEAST at +1/x8 by level 50. Many can do it earlier or at higher plus levels. You can do this now, today, without having to change anything in the game.
Transferring set bonuses to other sets will not let you ignore the numbers -- you'd still have to know which set bonuses to chase and balance damage, defense, endurance, etc. Transferring set bonuses to other sets will not make any old build just as good as a great build -- you'd still have to get the proper amount of set bonuses.
What it will do is decrease the value of Purples, ATOs, Winter-Os and certain other premier sets. Why pay for those when I can give those set bonuses to Trap of the Hunter or whatever?