Thanks, Seed, I appreciate the time you took to think about what is happening.
My NOID section is also doing that ... very thin blades and though they are mostly in sun (shaded by a bush in the afternoon) and start out really well in spring they don't bloom and have a hard time maintaining many leaves. What is left has a hard time staying upright and it is looking as though they'll likely be lost by end of summer. I hope I can rehome them before they disappear altogether, but I also wish I'd known that foliage type, beyond Dor/Semi/Ever, would be so important to cultivar selection here. Live and learn ... buyer beware
Some of the broad-leaf cultivars that are doing great after three years, with lots of foliage and repeat bloom every summer, are: Darker Shade, Enchanted Elegance, Fanciful Finery, Frankly Scarlet, Lullaby Baby, Party Popper, Prairie Blue Eyes, Rose Emily, Sings the Blues, Spotted Fever, Trahlyta, Tropical Centerpiece, Uninhibited and Whooperee.
Some of the narrower leaf ones that are really struggling and have never bloomed even though they are planted right next to broad leaf ones that are thriving are: Fin and Feather, Highland Lord, MacMillan Memorial, Mardi Gras Parade, Peacock Maiden, Pink Super Spider, Priscilla's Dream, Quest of Dreams, Red Ribbons, Rendezvous with Roses (Unreg.), Royal Eventide, and Super Purple.
Lots more narrow than wide ones, but I had no idea what kind of foliage each had ... so I'll really have to hunt that info out on new cultivars I'll need to replace them.