Yes, the Shangri-La Jr. is trash. It is just a slightly warmed over Jade with a worse headband and all the same issues. There is no proper baffle seal on them so it is as if the sound just hangs there, just so ever slightly out of reach. Very much lacking in engagement and any real presence. If it were 500$ or less, might have some slight merit but at the current price you can do so much better.
The EX-1a is for instance at a similar price point and difference in sound quality and build is miles apart. I've been spending a lot of time with them over the weekend (as the next big purchase is incoming today... ) and they are excellent. The headband isn't exactly comfy but as a homage to the older Stax style (similar to the SR-X1) they succeed nicely. They don't have the bass of the ES-2a due to the much smaller drivers, but at not lacking in anyway. Similar, slightly laid back, presentation and far more neutral than any of the recent Stax stuff.
The closest set that springs to mind was a few sets of Pro bias SR-5's I built years with Gamma Pro drivers. Excellent extension, very good midrange and an ever so slightly euphonic sound signature. The Stax SR-X1 goes after that same sound signature but the EX-1a just does it better.