Whether "we see" is acceptable in a screenplay is down to who wrote it, at what stage of the production process.

If you are a famous successful director who also writes, you can "we see" the hell out of your screenplay, since you'll be directing anyway and can probably secure funding quite easily (James Cameron, for instance, has "we see" all over his screenplays).

On the other hand, if you're an inexperienced screenwriter hoping to break into the industry, at the mercy of studio readers who pass on 99.9999 percent of everything they read, it is best not to piss them off. "We see" is, objectively speaking, annoying to read, though not as annoying as "dolly shot on" and other attempts to direct from the page (because when reading such directions, the reader no longer sees a story in their head, but sees a film being made).

Numbering scenes is pointless too, because that is the job of the production manager once the shooting script has been finalised.

On the other hand, if you script is in active development having been optioned, and you're working with a famous director, I doubt they're going to refuse to make it if you shove the odd "we see" in there on your latest draft.