Post them here. The devs look over all suggestions and especially polls carefully and are always fast to implement popular ideas!

Ok, while I like trolly responses as much as the next person, here is a legit answer to the OP:

The main place to provide feedback is on the PTS forum Official threads. These threads ask specific questions about newly implemented features that the devs want feedback on. If you post thoughtfully in these threads, you can be fairly confident the appropriate devs will see them. Of course whether they choose to acknowledge or act on your suggestion is another matter entirely.

Additionally, you can create threads during times when there's not an active PTS cycle happening. Usually tagging the devs in the thread is better than not. Use the "@ZOS_" prefix for people like Gina Bruno or Jessica Folsom (the community managers), Wrobel (combat design), Finn (dungeon design), Brain Wheeler (PvP lead), etc.

The reason for the trolly responses is because ZOS is not very conversant with the player base. They rarely acknowledge what threads and ideas they are paying attention to, or what direction they are thinking of going. So the player base usually has to respond in a more reactionary way than poactively. It's generally a frustrating experience.

cool thanks for the replies