Yeah, I feel like they're doing the best with what they have, but they've clearly written themselves into a corner with this Reboot thing happening when it does.
Basically... the Reboot happening at the end of Part 3 of 6 is good pacing in terms of the story structure. But they have another structure going on where each of the movies is supposed to be introducing a new Kyuukyokutai digimon for each of the 6 (non-Tai/Yama) kids. And that's good pacing too. Unfortunately, the two plot devices interfere with each other directly due to the way the Adventure series is inherently set up.