[wordpressfan]

You don’t need to first browse to a group, click a group name on a topic and you will go straight to that group forum where you can post a reply or new topic.

Correct. However, placing group areas within the forum front page helps indicate that groups are message containers. Placing all groups’ forum posts on one page is similar to placing every BuddyPress file in one directory.

Stickies cannot be show on the front. You may have hundreds of groups, each with stickies. This will clog up the directory and make it useless.

That should be at the discretion of the site administrator. Hopefully, a developer will create a component which provides site owners with more flexibility.

These points should not be taken as a slam against BuddyPress.