They look a bit like they've suffered some aphid damage - you've got some twisted pitchers there. Leave it as it is though and don't cut into green tissue. It looks like you can snip off the dead brown pitcher in the bottom right though.
I'm afraid the only new growth you'll probably see now is non-trapping flat leaves used purely for photosynthesis. Flava is a spring grower and the older pitchers will slowly decay over the next few months.
Your purpurea will carry on growing pitchers until it gets cold.
Keep them the same way as your VFTs. Sarracenia require the same dormancy.
All sarracenia cope fine with new conditions and being repotted - they're pretty tough. The advantage of hybrids is that with most of them you get pitcher growth non stop throughout the season. I would recommend you get a 'Judith Hindle' or something - they look their best in June - September at least.