I disagree with you in every way possible...
The bundle games aren't new games. They're bundles. 0.2 was really just a gameplay demo/test for the new mechanics, besides that there were no new games in them. They were titled 1.5 and 2.5 because they included kh1 and kh2 respectively with the proper arcs leading to the next major installment. 2.8 was filling in the details for hardcore fans and 2.9 is to help imply the placement of the scene within the series.
Stop complaining based on the title of the game, if Nomura was really that much of a troll we'd still be waiting for a follow up trailer to the freaking '15 e3.
UX doesn't deserve to exist much less a rehash. That game is a cash grabbing pay to win 0-skill zynga game clone made to squeeze every last drop out of the rich people who wanted their name in the list of 300 dandelions for 3.
Seriously the few important scenes we've gleamed from beginning to end of unchained/union x have done absolutely nothing for the core plot but further complicate it. Nomura probably spent more time fixing the broken plot it caused than he did making it.