The way that you and I play are classic examples of what it's like to play a season at either end of the spectrum. I play one compact season with accurate rosters (pretty close) and basically am "controlled" by what happens in the Majors, you, on the other hand, and like a lot of other people, have made a decision to have that control not only for the current season, but since you've decided to play multiple seasons consecutively, you're forced to do what's best for your team in the future, which involves making decisions now.
I've always stopped short of doing this because I didn't want to close the door on the possibility that I may want to play with someone else the next year, or just the simple fact that a new and better baseball game may come out and I wouldn't be able to accumulate stats over a period of time anyway.
I can honestly tell you that I have never played this way at least since baseball video games have aquired the real MLB and/or Player's license.
I don't feel confined by playing the game the way I do, as a matter of fact I prefer it, but I can feel a "fantasy" season coming on, I'm just getting the itch to do something totally different.