There should be an add-on to the UFO-Ultimate Follower Overhaul Mod that automaticly extends the follower limit cap to have up to twenty nine followers or more in the player's party in Skyrim.

Er ... you actually want more than 15? Things get too confusing for me with more than three.

That could be fixed with better follower management features in the mod.

Honestly, I took out 15 followers once. And only once - there are so many there that they literally trip over each other. And forget about caves - passageways are just far too narrow for that many bodies at once.

Honestly, I'm happy with 2-3 followers, and UFO makes that a very wonderfully realized reality.

Heck, one follower gets confusing to me sometimes.

Yeah, I've had to deal with 4 people accompanying me on a quest. That was difficult. I'm happy being able to have 2 from time to time.

Anyone that can do more than that must be a beast at multi-tasking.