They could choose to stay relevant, by keeping their music beautiful. I think most SX albums are beautiful, except for Paradise Lost. That's not beautiful, that's just bloated and too much of EVERYTHING.
I'd say, let RA do his thing (not 'harsh' all the time), let the fusion influences return in a cool way, and apply heavy riffs where needed. Make different rythm guitar sounds, not just that cold midi-ish Line6 sounds. Hell, MJR, get a tube amplifier instead of those ugly digital POD sounds. Get some of that MOJO goin' on. The band rules, lay off with the digitalism. Let the band shine.