@Demetrios1453 that’s fantastic stuff! Be sure to share it in the Enhancing Eve of Ruin thread.
I've posted some ideas over there already.
I'm still working out some of the 1 - 10 stuff that I'll do as a lead in (basically 1 - 5
Descent into Avernus' Baldur's Gate portion up to Candlekeep, and 6 - 10
Tomb of Annihilation with a bit of the Chult part, and then the Tomb itself, probably with very few changes in this part). It's mainly in the early stuff that will see changes, to liven up Baldur's Gate with more encounters besides what's in print (I dislike level 1 in published adventures having like 1 - 2 encounters at most; let's do a few more, just with some time to rest between), most notably seeding Vecna from start (the Vanthampur family are Vecna cultists and not Tiamat cultists, which will allow me to integrate
Nest of the Eldtich Eye from D&D Beyond), and making the trip to Candlekeep more lively (basically recreating encounters from that area of original
Baldur's Gate CRPG which are happily level-appropriate - bandits, ankheg, and gibberlings - my thanks to
Staircase for publishing official stats for that last one just in time!). I may even work in the freeing of Elturel from Avernus as part of the party's time there much later!
One big thing is that the chapter where the party is level 18 is basically nothing more than the big plot twist and then one encounter fighting a handful of demons. That chapter certainly needs to be livened up a lot more with
something...
Once I've got things worked out and coherent for the entire campaign, I'll post my completed ideas over there.