I'm not a cryptologist, just an interested engineer (& now retired). I used to design hardware with AES en/decryption blocks & generate test vectors using my own Tcl script using the embedded aes function.
However, I was wondering if modifying AES to use more than 1 SBox (& inverse), it would be "more secure", or is that not the case? I've found 1108 SBoxes that meet the original criteria (out of 256! possible combinations). My view would be to have a short table to indicate which SBox to use for each round of 14 (assuming 256 key). I realise this would complicate h/w a bit, but not be very complicated to modify a C program. Initially just using 2 SBoxes, the original & one other, but easily expandable to use 3,4.. etc in software.
Just after thoughts really.