This forum has poll functionality. It seems like it'd be vastly superior to do that instead of asking for individual comments in support of/against.

E.g., select all you'd be in favor of:
- Allow up to 6 with no additional changes
- Allow up to 6 but with changes (e.g., split exp, rebalancing encounters, default party size, etc)
- Allow more than 6
- Keep party limit at 4
- Reduce party size below 4

(If you do create a poll, it's probably worth iterating on these options a few times with other posters to create a somewhat "official/approved" poll)