Glacial augment Caitlyn seems pretty good tbh
Running Inspiration will still allow you to get AD/armor Cait has shit synergy with lethal tempo/press the attack, and fleetfoot work is shit atm
In the inspiration tree you can get future's market/biscuit, and approach velocity Market allows you to get BF sword while having 1100 gold, I think it's pretty good but you can also take biscuits delivery instead
Approach velocity allows cait to have 376 MS instead of 325 against slowed targets at lvl 1, this makes cait able to hit twice in lane someone who got slowed and thus get a free hit in trade, it also makes her able to hit Q better if they're slowed
here is an example of what is possible