Yeah I did take a shot at that mod, but my main issue with it is that it's not as customizable as NBXlite was.
You only get an option to create a world that looks like beta minecraft (or alpha), there is also an option to toggle caves in case of Beta+.
And worst of all, you can't toggle specific structures off, which means villages can spawn. And when these spawn they... Tend to break, badly. I saw villager houses that had terrain inside of them, roads and structures which were following terrain level (some houses were generating in a way where one wall could be 4 blocks higher than the house and other wall was lower.) And some villages are straight up floating in mid air.
Not to mention, you can't toggle new biomes off or on.
Meanwhile NBXLite allowed you to toggle specific structures off, you only got the biomes that were in the version you choose, and the accuracy of the generator was also higher, spawn point was exactly where it would be in beta, even tree positions were accurate.
If I were to choose between NBXlite and Beta+, I'd definitely choose NBXlite, at least until Beta+ is at a customization level where you can toggle features on and off.
Like, I'd like to combine 1.7.3 overworld generation with current release nether generation. Maybe enable Strongholds (with the mod "Save my stronghold" I think you can make them generate properly in non default cave generators) to get to the End, but definitely disable villages and pillagers.
Villages break the progression for me (mainly because I keep finding them every few steps I take, even on freshly generated world) and I can't find any mod that would let me get rid of them for 1.14 or 1.15.
EDIT: Included two comparison screenshots. One is actual Beta 1.7.3, the other, latest Beta+
There are just... Too many trees here. There are even trees on the cliffsides! Not to mention there is a village nearby that looks like this!