Cleaning up an IVC is much more labor intensive than something like a WSM. Pellet grills also require a high amount of cleanup + maintenance (ie foiling the heat deflector, cleaning out the firepot; both of which require you to take apart the insides). I loved my IVC but after a big cook it would take me roughly an hours worth of cleanup to get it ready to cook again. Mind you I was cooking as a BBQ business so I had to make sure all my stuff was thoroughly cleaned, but still...it required a ton of work to get it ready to cook again.
I spent about a month trying to get the BFG from Rec-Tec to work properly, and after all cooks it was a huge undertaking. Again, this was a very large cooker, but having to remove+store all the racks, remove the heat deflector, remove the foil from the heat deflector, and then having to clean out the innards and vacuum out the fireport was a decent amount of work. Plus having to refoil the heat deflector, clean all the racks, and put it all back together wasn't a 5 minute job.
I just want you to temper your expectations of simple cleanup with either a pellet grill or IVC. My offset is so much easier to clean as I run a wooden grill brush across the grate to knock off the bits into the bottom, and then I spray it out...done and dusted in 10 minutes max.
As for smoke flavor pellets are extremely light and there's really no way of getting around that...if pellets are your only source of smoke. IVC is a much better smoker in terms of getting smoke flavor. My IVC was very close to that of an offset...probably 85-90% of the way there. I never used an LSG IVC but they didn't perform any magic with their cookers ; same concepts everyone else is building.