I had my Salina for 1.5y now and I can tell you that the dinghy is not a problem.
It is always dry and clean, I can lower/raise it in seconds, never had a wave hit it yet even in a 30kn following sea down the Atlantic coast of Spain
And the outboard
leg does stick out a bit, so it does in any other catamaran
dinghy, if I get worried on a long passage
I will remove it as most cruisers do and hang it on the rail.
Also, it positively locks under the sundeck and does not swing port and starboard at sea.
I bought a few handrails and added here and there where needed, so that was a simple thing to solve.
The half bridgedeck is great, we hang in there unless it is raining.
The boom is low and I can zip/unzip the bag, fold the main easily.
All these features seem the same in the Sanya, so I think FP has thought about it.
These boats are built for sailing as well as dock
living, very difficult thing to achieve in a cat.
Hopefully someone with a Sanya will post his experiences soon and we will stop speculating.....