Pluginless texture/model replacers don't need a GECK, but I presume software like Nifskope would need an update to handle any new properties in the models.
I did want to overhaul the stats on equipment to even out item progression, I hate when I get something cool in the early game and then it's useless or outclassed later on... but I'll have to find out how crafting, equipment, and power armor works now that I see it's completely beyond my expectations. Maybe I won't need to make that kind of mod.
I'd also like to try my hand at a "realistic needs" system that doesn't just feel like a chore. Add something like the Well Rested perk for food, to add temporary health regen from eating. And for sleeping, I'll probably stunt AP regen if you haven't slept in 24 hours. Keep it simple, stupid.