As an option, its great for those who just want a quick, dirty, pick-up-and-play dungeon romp. I'll admit though, in 27 years of gaming, I've never encountered those gamers (one-of games, yes, but never the "let's just kill random monsters for a while"). Well, not in the tabletop gaming world anyway...and if I have encountered them, they hid it well.
Still, with the rather vocal community this game has already developed, it seems the number one request/reaction is that SCL needs to have custom, tile-by-tile map generation. Certainly something I agree with if this game wants to have any kind of longevity.
I have little doubt it's going to be a high, if not top priority for nSpace after launch, and will likely be added as quickly as can be done. That said, I'm not touching SCL until that capability exists. It should have been there for Day 1, not a "Whoopsie! We'll get right on that" situation.
Edit: The more I see of SCL, the less impressive it gets. Exceedingly limited creation tools, seemingly (but not proven) limited-to-no modding ability, lacking the full range of core 5e content...yeah. I suppose it's impressive for a small studio's first foray into self-publishing a large RPG like this, but what it's offering is...well, a nerfed Neverwinter Nights (just with prettier visuals).