Unreal Engine for mobile

I used UE to make a small game for mobile, but I had the following problems that made me look for other possibilities:

  • The file size was enormous, even for a blank scene compiled for Android was 140 MB.
  • I had issues with screen res, the compiled game had waaay lower res than my tablet’s and even with the help of staff here I needed a week to sort it out.

I would like to ask those using UE to develop for mobile, has these things changed? The file size and the hassle with compiling the game.

Thanks in advance.