I haven't tried Hexxit until recently, and I can say it is quite a lot fun. However there are some things I would like to uphold.
-Setting "Hunger after death" to "false" in Tinker's Construct's config would remove confusion to new players, so they do not have to wonder why their hunger is not full after they die.
-If Lycanite Mobs is to be kept in the full release, disabling the spawning of elementals (e.g. Geonachs, Spriggans, Jengus, and Cinders) would be the best bet as they add too much unfairness to unsuspecting players.
-As for the hard freezes that can last up to 30 seconds, increasing Roguelike Dungeon's "spawnfrequency" from the default "10" to "16" or above helps remedy the problem (there are two roguelike configs, one is its own .json and the other is in the folder "roguelike_dungeons". Both must be edited). This also cleans the world as these dungeons seem to spawn way too frequently.
-Project Zulu's grey horses are still spawning.