I totally agree that it is - my personal opinion - current not worth the effort (=time for end users).
It works mostly randomly, depending on the Proton version, and hoping that the MS installer/wine combination works somehow during the NET installer.
The scripting currently does not help much as under the hood they also use normal Winetricks.
I had no reliable success with SteamTinkerLaunch.
It would help if Wemod could compile a self contained binary without external dependencies / (maybe with less tracking) for Steam Deck users. Yes, I currently think I would pay an extra fee for this.
Recently I found GitHub - SheffeyG/CheatDeck: Launch games with cheat or trainer and other settings in steamdeck quite helpful, maybe this is also path for others (its simple, they use PROTON_REMOTE_DEBUG_CMD to launch an additional exe file of choice in the bottle/protondb), I like it also for the simplicity of using.