Lot of pros to smashing, opposed to standing. The biggest is they can't get under you. All kindsa bad shit happens then.
Biggest con, is its almost guaranteed to be a fight if he's good. Which means work. I don't like work, but I'll clock in cuz papa's gotta eat.
As usual, I think sound fundamentals in both strategies compliment and open up opportunities for each other.
Anything flying or rolling, I overuse. And love it. Main problem with this I've found is new guys doing what they think I'm doing and end up with a poorly timed and non setup positional suicide. I failed a lot before I finally got timed and oriented, but I never just rolled for tha fuck of it. Lotta white belts doin this now, and although I never taught it, it's my fault we have people rollin like idiots. I guess they'll be fine.