It's a solid game if you like a game where you raise your own monsters to beat other monsters, that you walk from Point A to Point B all the time and that it has a lot of dialogue, my issues are however :
The repeated use of same models. Male Model A / Blue Shirt looks the same as Male Model A / Yellow Shirt except the person itself has a completely different voice actor and personality. There's no excuse for this as it occurs both in the digital world and the real world of the game. This is beyond pure laziness because they have 250+ unique models of Digimon with fluent animations that's unique to that Mon. Why can't humans be different except of Typical Protagonist A, B, C, D, E and F?
Online Matching is also butchered. There's usually Generic Japanese Guy with +9999 ranking who has a sub-optimal team who will continously revive themselves, heal themselves, have a burst AoE damage ready and a few moves that also allows them to get MP making it impossible to beat them without grinding for 100 hours for a sub-optimal team yourself.
On the other hand, there's a lack of ranks in the online matchmaking : Why can +9999 match with newbies? Why can Ultra teams match with Non-Ultra or even Rookies? There should be a Mega/Ultra-only, Champion/Ultimate only and Rookie/Champion only matchmaking.
There's also no way to matching with friends on PS4 unlike in Vita, they removed a function (LAN) which they did not re-implement to match PSN ID's.
NPC's have infinite MP but players don't so the NPC's have a major advantage in infinitely healing themselves if you can't burst them down.
This shouldn't be too much of an issue in Story Mode, however in Online Matchmaking they can have Ultra teams with infinite MP and in Offline Coliseum it's quite an issue as it's not about skill but rather making the team who can bullshit their way through it.
Status Effects are also ridiculously overpowered in this game making it a competition in the end-game and online to who can apply them most quickly, there's no way of becoming immune to more than one SE.
This game is moderate to 100% if it wasn't for the stupidity of Medals which is just tedious to get. Each vending machine have 30 unique medals and only one can be purchased at a time, the random factor is making it require around 200 purchases in average. There's no option to bulk-buy them either and there's about 10 vending machines. There's also the medals dropped from wild encounters so you need a guide or a checklist to get all areas out-grinded for the medals. Finally there's the medals gained from randomized "find my item" missions, you need a certain mission for a certain medal which may require a solid 100 to 300 resets if your luck isn't good.
This is a rant designed just for completionists like myself, it basically cries out to you that you do need a guide or look it up online and it's just a boring and tedious process.
This game also features New Game+ allowing you to restart the game with all your progress intact which is a bonus.
There's however no way of skipping cutscenes and dialogue. This can make restarting a playthrough boring.