I agree with you, in moving water the Martin Panther has a better action than the Mepps and seams to hang up less. I only use two colors, black / gold or yellow / silver.
And swivels are for people who don't know how to tie knots. If you like the action a swivel gives, tie a bowline and leave an open loop. It's a better action without hanging a lot of hardware on the lure.