After I clipped my Flip's tips, I notice a few things:

It does roll better at slow speed. Flip's high speed roll is blinding fast, no question about that. But stock wing's low speed roll leaves something to be desired.

It tracks straighter during waterfalls

It will not flat spin for jack. It's much more difficult to do inverted flat spin, and will not maintain long. Maybe it's just my lack of skill. But when it had tips, it will inverted flat spin in a heart beat.

Harrier does seem a little more stable, but still rocks after a while.

Tail heavy landings don't balloon as bad.

Knife-edge spins are easier. I can just fly KE at flying speed, kick in down elevator, and it will start KE spin. Tail heavy KE spins do not require up rudder.

It looks like tipless has more pros than con. But I really miss those flat spins though.