Okay, found a way to bypass the issue, pretty sure that's hacky but just to be sure, know that I tried nothing more than :
- Fix the longass installing loading
- Being able to play the mods I want with my friends
- I play ONLY with friends, so I don't know if it's an issue in multi lobbies
- Plus, I have absolutely no experience in modding on Dos2
- Bonus Plus, sorry for my english, but bear with my explanations :<
If you're ok with that then, look for the mods that cause the installing issue (you can have multiple of them triggering one of the two download of Patch_1TDE or Patch_2, you'll get why in a bit) and unpak the mods in a safe folder,
once it's done go into your mod specific folder and open the "meta.lsx" then look for <node id="ModuleShortDesc"> then search for <attribute id="Folder" value="GameMaster" type="30" /> and/or <attribute id="Folder" value="DOS2_Arena" type="30" />
Once you found them (or one of them) delete the whole thing starting from the <node id="ModuleShortDesc"> to the </node> surrounding it. (If you don't get what i'm talking about it should be a little more helping : https://i.imgur.com/K2Xle4y.jpg )
Save it, repak it, make sure to give it it's correct name and tell your friends to remove the old version of the mod before launching the game and you should be able to play with your pals without waiting for another lightyear, at least it worked for me on multiple mods who were causing the installing issue.