Is there a running list of official future features and officially recognized suggestions? I have some possible suggestions, but I don't want to clutter up the group with redundant suggestions that are either already confirmed as features for a future version, or ones that the dev team have already added to their list of possible features.

All suggestions for PhpED are expected in this forum. Feel free to post

Is it common practice here to break up suggestions into individual posts to make it easier for devs to keep track of them, or should I combine all of them together?

If you're expecting some followups for a particular suggestion, it's better to have it posted separately, otherwise it does not matter at all