Changes I would implement if it was up to me:
- Shorter block time, down to 1min, you'll have more 0.00 blocks but it is all about Tx so faster is better and chances of finding a block is higher since diff will remain lower than now.
- KGW as it is better than nothing and the code is out there, a sliding difficulty window to avoid getting trapped in high diff
- Switch to SHA3 (keccak) algo for ASIC resistance, fair chance for everybody even with GPU, for example: I have terrahashers in pre-order so if I would unleash them once delivered it would ruin this coin for the majority of the miners, taking into account that PMC will grow.
All decent suggestions, and rest assured I will not write any of them off. I'm always open to good suggestions.