I fail to see what you understand as slow pace, but to each its own. And yes, it's a six part story, thst was the intention, so what's so surprising about that? The more I read in this thread, the more I think some are watching this show with rose tinted eyes. I better not stay around here too often, it may be bad for my health.
It's more like really few plot happening like Gizmo said. If we talking about Slice of Life, tons of other anime are better out there and it's not movie format.
Maybe the problem here is it's a movie format. I expect many things if this is movie format. Harry Potter movies can cover 1000 pages of novels, yet This Digimon barely equal to an arc of a manga.. This is even worse than Sailor Moon Crystal that got 26 episodes but only run every 2-3 weeks and fans complaining its pace. So expect that Tri actually will get more complaints if they don't fix the plot from part 3 onwards….