Many thanks for the responses. Consensus seems to be stick with Han, so thanks again for that. My thinking with Shore was he'd have a short cool down because of R2 supplying him with Foresight and the others using up the Tactical Genius.
Ackbar's a personally favourite of mine so I don't know if I want to switch him out for lando. Might be irrational but there you go. Plus Rex's killed me before I swapped him out for R2. As for Ezra, the bomb he drops with Leia + Random third can be pretty potent, but I'm always open to changing things up and Boba's solid toon. I'd been wondering about Fulcrum and if she'd be a better fit instead of either Leia or Ezra.
Anyway, main take away is stick with Han. I think I'll wait until Fulcrum is out in the wild before changing things further.