I pretty much agree. As a hearing person learning to sign, I've been told by deaf people that when I try too hard at ASL I'm harder to understand. I've resigned myself to the fact that I'm signing modified ASL. I try, but English is my first language and it's gonna take many more years to get ASL grammar.
I do have to say SEE seems useless to learn. I don't personally know anyone who signs SEE. I know there are a few people here who know it and grew up with it, but I think even they have said they're trying to learn ASL because SEE isn't really used for communication.