It would be interesting to compare its performance with claws, which already works pretty well on the tablet.
Both aren't the best imap client[*], but both are "good enough".
[*] Edit: that would be mulberry, the only one that really uses the imap paradigm to its full potential, and it would be killer on a constrained device like the tablet. Polymer also gets it but it's too buggy and bare-bones, and I couldn't get telomer, the tablet version of polymer, to work with diablo.