That desire/bias might explain why Triss choice was initially and pushed late into the game and even once this was corrected it was only half heartedly done, without making even the small dialogue changes to allow reactivity, let alone an UMA inclusion.
The decision to move Now or Never earlier in the story (at least in terms of recommended level, it is still possible to play the quest in the second act) was not necessarily for reasons related to the romances, it is a change that affected 8 quests. Originally, Ugly Baby would have been the last quest in Act 1, and then Act 2 would have had three branches just like the first act, but shorter:
Velen: A Towerful of Mice (q106), Return to Crookback Bog (q107), Forefathers' Eve (q108), For the Advancement of Learning (q109)
Novigrad: Carnal Sins (q308), Now or Never (q309)
Skellige: King's Gambit (q206), Coronation (q208)
These were all main quests and then demoted to lower level secondary quests. The rest of the main quest line would have continued as it does now (The Isle of Mists, The Battle of Kaer Morhen, and so on). Also, Triss had a role in Carnal Sins, which was deleted (perhaps to make it possible to play Carnal Sins after Now or Never), although it may have been a minor role, the details are not known.
However, Yennefer's romance was also changed, but earlier in the development. I have found references to a fact named "q208_yen_lover" in the game files (instead of the usual "sq202_yen_girlfriend", where sq202 is The Last Wish quest), and according to an old leaked document, she would have been in the Skellige branch of Act 2 (King's Gambit and Coronation, the latter is quest q208). That suggests both romance choices would have been later in the game, but Yennefer's was reworked - with a fair amount of effort - with the creation of The Last Wish, deletion from q206 and q208, and modifying Ugly Baby to react to the choice. Now or Never was later moved forward, too, but without updating quests to take the choice into account, maybe because it was too late by then.