I wondered about that on our 2250 as well. I thought about adding some stiff L brackets to the back of the facing trim & the slide casing to strengthen the facings. Perhaps I'll go ahead and do that before the facings decide to part company with the slide.
When we bought our previous MH, we found one without slides as we didn't want to deal with all the issues surrounding them. I thought that slides had matured a lot since their introduction many years ago to the point there wouldn't be issues like this, but from my own limited experience, and reading a lot about others experiences, I've started questioning my decision.
We sure like the smaller footprint the slide provides, however.
To try and ensure a trouble-free slide into the future, I've lubricated the tracks & gibs per Lippert's instructions. Not only that, I've cleaned all exterior surfaces as there was label stickies and some errant adhesive here and there, then sprayed all surfaces & seals with dry silicone. The slide floats in and out like a feather now... hope it is good insurance. A lot of slide issues come down to the lack of lubrication on both the gear track/cogs/bearings, and on the wiper seals.
Formerly: 2000 Four Winds 26Q/Ford, '96 Kit Sportsmaster 22' 5th wheel, '91 Sunlite truck camper, Wildernest flip-top canopy