Little comment after completing the time stranger game

I know I'm a little late, but as a Switch only player, I couldn't really get the game earlier.

I recently finished the Digimon Time Stranger game (pre-DLC) completely (in terms of missions and dex).

While I am happy that we got another Digimon game and that the game is much better than Survive. The game is generally great and all, but certain mechanics really frustrate me. For example:

1. Why the heck did they remove all the USB (in particular, those for increasing scan rate and exp)? I mean the load enhancement is both good and bad (with the low scan rate). The problem is, at mid stage, you really just meet very few baby and rookie digimons. There are like 2 time-limited areas that I love farming (at the start and during the Goblimon farming event), but both of them are not accessible. In fact, you are only allowed to revisit pre-time skip areas very late in the game, making farming in mid-game very difficult.

2. Why are we now back to training everything to 9,999? The good thing is that it allows us to theoretically finish the game in normal mode with our favorite rookie. But men, it really does not balance the game. I know it's on me to try and train my team to the utmost if possible. But, there is no way for me to know how strong my opponent is.

3. Why is mega unlocked like near end-game? I know part of it is on me for forgetting to complete the 2 side quests before time skip, but men, I had to fight like until Dianamon's quest to even unlock my megas.

4. I'm not sure if it's me or whether I just missed something. But I think Inori's room was something never accessible. The ticket selling window before their house is as well. Inori's father (the detective) never really gave me any missions, and just got lost after time-skip.

Any way, great game, but hope the next game can deal with some of these issues. Thanks for reading.