There is a marked bias among people I train with, even high-level grapplers, against osaekomi and pinning. Most people do not think it "counts", and that it does not constitute a finish, especially in the street or in MMA. I happen to disagree, but I'm not here to debate it myself.
Convince me that osaekomi is either worthwhile or worthless. I know that this is somewhat contingent on the ruleset, but as it was developed in judo, it was meant to represent a symbolic death in real combat (or that's what they say). Rousey used it highly effectively against Carmouche, and to a certain extent, you could argue that GSP's positional dominance over Diaz was akin to pinning.
I like seeing ultimate control, regardless of the finish. Tell me what you think.