Unfortunately, with the rework of maps many of the previous easter eggs were removed, including the Applew0w one which tells „Caution! Falling apples” that can be seen in the picture below.
https://ru-wotp.wgcdn.co/dcont/fb/image/tmb/appewowcliff_684x.jpg
However, at the same time, many new ones were added.
1. On Abbey, on one of the buildings there is a poster, which writes „Bulba” in the Bulgarian language (from the name of the player named bulBano)
https://pp.userapi.com/c830108/v830108093/6ee91/lPjTTL8m5xA.jpg
https://pp.userapi.com/c830108/v830108093/6ee9f/ap_wwVp5_qk.jpg
2. On the Ensk and Siegfried line maps you can find the Wargaming logo on one building.
https://pp.userapi.com/c824503/v824503159/b0e63/aFCH7vhrcCA.jpg
3. Updated the planks (?). Might mean something only to Russians.
https://pp.userapi.com/c824201/v824201507/b33b0/1bUvNzbI6Gw.jpg