I think it has helped Jurina get coverage much more than SKE48, to have her guesting in AKB singles.
When songs like Tsuyokimono yo showed up (which was nearly a year after Oogoe Diamond), I only watched it to check out SKE48. So the guesting nearly made no impact on me. It could've been much different in japan though, I guess.
I didn't like it at all at the time. Not due to Jurina-hate, she's a great performer. But because every second she was on-screen, it also meant some AKB member had just lost a chance to show herself.
I'm alright with it now though (kinda got used to it). But I hope they also let other members with potential (from SKE, SDN, etc..) to show their stuff in future singles and MVs and gain some fans in the process too, just like Jurina did.