[BaseballMan]

I would have to say that i am one that prefers all the real teams but i think the list is an improvement for those who wish to start in 1871.

For the questions
1 is no but i think you have to disable playoffs or use a custom playoffs.
2. I believe AL or NL must be used to get rookies to import to correct teams.
3. I think they will be for ones who just want to start in 1871. They be helpful for people like me that want the duplicated chaos of the beginnings of baseball.

Transactions should not be a problem as i have been able to do with all the real teams and rosters. You may have to watch injury setting. I have a trans action list based on the real player movement but in some cases i had to estimate a trade date. When i did i had to be aware of the roster size and choose a date in which a team would not fall below 9 players.

So if i was able to do it with the real roster moves i'm sure your custom transaction file would work with the proposal.
I would prefer not to have the AL till 1901 but i know others may prefer to have the AL and NL.
I like the progress and that is from someone that using real owners
as well.

If this works maybe eventually we can have an option for the real teams and expansion in the future.