I’ve been planning to make this for a long time, so some suggestions:

- Remove the buttons and switch to a Tinder swipe. Saves space on mobiles

- Prefetch content for next follower

- only show last 3 tweets

- option to hide RTs

- Sort by last activity. The people I just followed are the ones I’m least likely to unfollow now, so show either old accounts or older follows first.

- bio is important. It needs to be present for context.

For a rough implementation of the Tinder idea, see https://github.com/captn3m0/quick-list-select which I made to help me filter large lists manually.

Disclaimer: I've only tried it on my mobile so far