That's true about 4g, as opposed to LTE not showing, but that was in DU chanelog. I can confirm, though, that the icon can be changed in gravity box. Both icons are already in framework-res.apk, so, all you need to do is to address the 4g icon in a java file. Gravity hooks into framework and allows you to change icons without making permanent changes. Gravity does not burden system/battery, unless you use its smart radio feature, which I don't use.. It also provides additional features, which are not part of DU. So, I recommend to use gravity box.. Both xposed framework and gravity are pretty stable...Okay running smoothly sofar.
I did flash after Factory reset.. Tried wipe cache only first, but google play store and services fc'ed . 1 thing I came across... OP says that ROM now shows 4g instead of lte, but mine still shows lte
Als there seems to be a (small) lag when I press the power button tot screen on and wiping to unlock. Other than these minor things ROM is great!!!
Battery seems to be okay too.
Great work @optimumpro