A long shot on a 7ft table is not that long on 9ft…No just bringing up an important point. Many things will be different between 7,9,10 fussers. Basic shotmaking won't be.
If you take the time to shoot ALL your practice on a 7'er with complete lines out to infinity, the transitions to bigger tables will be speed and the angles "relaxing" over the size increase. Not much to deal with for a pool player. Note respective experts will still have the idiosyncrasies wired and expertise at one size may not insure expertise in another. Just saying 7' only doesn't have to be death.
Practicing on bigger tables, always makes shot making easier on the smaller tables, dealing with clusters is a different thing, but if you play 9 or 10 ball, it’s a non issue