Extella Link is a very polished musuo game with decent ally ai since your cpu allies can actually capture objective points which is a nice difference from useless ai characters in other musuos. Enemy ai is ok on highest difficulty.

The game also has a system where you can use ingame currency which you get a lot of per mission to level up the new characters you unlock and get them to the same level as your highest level character. This means you don't have to grind with new characters to be able to use them on the latest missions. I like this feature a lot since I can switch characters essentially every level.

Overall Fate Extella Link is a very polished musuo game that is accessible to anyone who enjoys the Fate franchise and they made the game accessible even to people who have complaints about the average musuo game.