To compensate for Loaned Units, Coliseum daily battle limits should be removed
Back before the introduction of loaned units, the 5-battle limit made more sense, as we were forced to use more or less the same teams each time. However, now that we have loaned units, the amount of different teams we can try has increased way beyond what we had before, and the 5-battle limit feels so much more restrictive. I often find myself stressing over which 5 teams to try each day to maximize my score and which teams to leave behind, and it pushes me away from wanting to play coliseum sometimes because of that. I feel like the Coliseum would be so much more fun and I would see myself being much more invested in it if we were free to try as many combinations as we liked.
Within the 10-Year Anniversary post and the introduction of the Coliseum, it was stated that the reason for the 5-battle limit was, "once you achieve your best score, you don’t need to keep battling over and over again that day". I don't believe this reason is justified anymore: it was true when summons were in place of loaned units and you really only had 3 or 4 different team combinations to try, but now that loaned units are here, progress can be halted by the limit, as your "best score" might be from a team combination you didn't get to try because of the strict limit.
I do hope a change to this limit can be considered, because I really enjoy the Coliseum and this feels like a major roadblock to my full investment in the content.