It takes almost exactly 7 seconds every time for the page to refresh after clicking Complete, which is a real drag on my drive to do Kumos quests. It's the same if I hit Complete on the top bar or I go back to the quest giver's page.

it's always done this for me :'D almost 7 seconds exactly each time, which is odd because the actual searching and purchasing of items is super fast!!!

Yes, I noticed this also. Thing is I noticed the action is actually fast, the page loading is the slow part. I mean, when I buy the item it takes some seconds to mark it in green right? but, if I buy the item and go back is already marked. Same with the "Complete quest" button, it takes a couple of seconds to become clickable after I buy the items (and then the results page takes another bit to load), but, if I buy the last item and hit back I have the button at my disposal... it goes faster that way, buying and going back, than buying and wait for it.

It is really slow when you hit the complete button

After the layout problem got solved yesterday Kumos was SUPER fast all around and Subeta lag free as well. Unfortunately didn't last for very long :-(

It is slow and painful enough that I feel like I've been transported back to using dialup in the early 2000s. Meanwhile on legacy, everything is so fast that I was able to split my screen and do quests in one window and slots in the other with zero lag. Having both of those windows going at the same time in legacy is horribly slow.

I took a few months off hoping that quests would get better but honestly they feel worse, and now that the CSC reward is lower, I feel far less incentivised to sit through the kumos quests.