TY, i’m somewhat proud of that little logic. (But then again, it was entirely self-serving coz Lab Rats got screwed up coz of shifted numbering.)
As for the rest of your message: There has been talk about the requirements for TheXEMv2 (including mappings that are currently impossible to do), but time is scarce and there aren’t actually a lot of ppl (read: none) volunteering to work on it… I don’t blame em, coz designing a complete backend and fluent webui for it isn’t something you do in a weekend… or even several weekends.
But it demonstrates a symptom I often notice: It’s easy to complain (or even rant) about lacking features or UI, but ppl rarely offer true ‘community’ solutions.
It’s also good to point out that TheXEM WebUI was never intended for public use. Even I don’t use it, I leave it to the experts. 
Originally it was created to support the sickbeard anime branch, afaik Sonarr was the first other application that started using it. Growing beyond anime-only shows obviously made it run into design limitations, but absolutely nobody can be blamed for that. In our eyes it’s better than nothing.
In any case, I’ve asked TheXEM admin if it’s possible to track drafts and how long they’ve been pending approval.
That said, a show like Bar Rescue can’t be fixed without something like TheXEMv2 and extensive changes on Sonarr’s end as well. The current xem mapping seem to come pretty close though, except for a few release that got numbered differently by scene groups.