To be honest I'm the same I'm using the Client to play yeah i tried tweaker first time it made things worse for me. I had factory reset my pc to get the game back and HDD space, been ok since but I still feel it's eating space i check my HHD everyday, and to be frank we should not have to use a 3rd party program to play the game nothing with using tweaker but we should not have to this is not some green lit it's sega.
But I hate the fact i feel like I'm playing russian roulette every time i restart my pc or close the game, why they just did not go with the game own launcher from the start is beyond me. I know they said it's going to steam but I'm EU and i already have a steam account linked to my email I dont want to have issue's doing that as well but i dont know how much this will take to play from the EU hopefully easier.
But it was such a bad launch so many people had issue's including me i mean you just have to look at the rating on the MS store. I still have people that i play with that only the other day said the game removed itself and they had to re download it