The game loads very slowly + very high electricity consumption -

Today the game loads several minutes and I am seeing a very high electricity consumpion.

Do you have another similar graphics intensive game you can run and compare it to?
One thing you can do is turn off “peer exchange” in the WT launcher app. This basically makes your computer a node in a file torrent for distribution of the game files. Basically Gaijin is using your hardrive and network access to propagate its products (and who knows what else).