A new version was released today/yesterday in F-Droid. I've just upgraded and the first thing it says is "What's new in 4.3.5. New, faster Version 2 (OpenGL) map rendering engine, with 2.5D view"
Edit: Also, thanks to the replies here, I see that 4.3.5 was actually released in F-Droid on the 1st January, and 4.3.8 is also available since yesterday so I upgraded twice today already.
Edit: Also, thanks to the replies here, I see that 4.3.5 was actually released in F-Droid on the 1st January, and 4.3.8 is also available since yesterday so I upgraded twice today already.