Keep Yoshi's Story as starter, although a bit janky it's a small stage with platforms that favours characters who has poor recovery in general due to size of stage / blast-zones. It's a starter in Melee too, it will make it easier for Melee vets to adapt with the stage list.
Green Hill Zone is mostly a mini FD with walls, so with FD, PS2, and SV, it makes it redundant as a starter stage. YS > GHZ imo.
Remove Lylat Cruise due to some error with recoveries, mostly Side-B with CF, Ganon, Fox and Falco. They'd fly underneath the ledge when they shouldn't. Other characters are possibly affected too but unsure who else at this point, Distant Planet is somewhat similar to Lylat Cruise, it'd make a great replacement.
PS1 is arguably the same as PS2 but with transformations. I can understand if people want this stage removed but there isn't a non janky stage that can replace it (Pictochat is a FD version of PS1 also jank). Maybe Dracula's Castle can take its place but unsure of viability in singles.
Skyloft's ceiling is a bit low while the lower blast line is also a bit too low. Make little sense, but layout of stage is unique. I can understand why people hate it, though what to replace it with?
I would want to add Metal Cavern to Counterpicks but with Yoshi's Story, Warioware, and FoD being available, it makes this stage redundant. Norfair's ceiling still too low to be viable imo.