FPS Drop on Drake Maps

When the 3rd Dragon dies and we get the new map the game takes a dip in performance. This is particularly noticeable for Ocean map and only slightly noticeable on Inferno and other maps in my experience so far.

It's most specifically happening when the map's visuals and screen filtering/coloring changes. E.g Regular map to -> Blue/grayish in Ocean map. Then the FPS continue to stay low for the rest of the game until the game ends.

For anecdote I get 120 peak FPS and usually between 80-100 in regular action gameplay. On the Ocean map I peak at 60 FPS and regularly go below that to 50 and 40 FPS when there's more going on on the screen. My friend with 240 FPS usually gets 120 FPS on average on the new Ocean map.

As an additional request I'd like to also ask for an option to turn off the Dragon map's visual coloring/filters on the screen. I'm ok with Cloud and Mountain drake screen visuals, but the Ocean and Inferno drake color my screen in such a way that it hurts my eyes to look at game. It's not that I "dislike" how it looks because it's "ugly" or "annoying". It literally hurts to look at for extended periods of time and takes my focus away from the strategic focus of the game.