In my limited experience of two years overwintering peppers, I found that C.chinense plants will be the most sorry-looking, over C.annuum and C.pubescens, that last one actually doing great indoors. Small and misshapen leaves have been the norm for my Bonnet/Hab. The plants came back to their old selves when daylight lengthened and temperatures warmed up though. I suppose you could just wait it out for now. Trim the plant back a bit if it somehow becomes unmanageable. A sparser plant also gives you an advantage over aphids or other pest. I'd suggest to re-pot to 5gal whenever weather is good enough for your plants to stay outside every night.

We just had a 5 day cold spell. The 30 day weather forecast predicts nothing but 63-80 degrees from here on out (zone 7b in Arkansas). I will repot tomorrow with fresh soil and throw in some bone meal and mycorrhizae fungi. If they survive this final test they're gonna be huge!

I am in Austin and my plants looked like they were on the downward spiral. I kept them outside since the last frost which was 2nd week of Feburary. Although we have had a few cold snaps since then, they have remained outside and get around 6 hours of sun. They have bounced back tremendously. Just give them some natural air and sun and I am sure they will spring back. BTW my plants are 3 years old.

Sorry for the late update but here's what happened. I repotted all 8 plants after the last threat of frost and really, really shook the dirt out of the roots. I think this shocked the plants and 3 of them didn't make it. The other 5 are doing just fine and have fruit all over them! I finally found a drastic but highly effective solution to my aphid problem. I bought a $40 quart jug of "Promise" and watered the plants with it well before they flowered. Not one single aphid so far this season. The stuff works wonders and only one treatment per season is required but be very careful as it is highly toxic.