Me and couple of my pals applied in OINP non-express (online) this year. I got my AoR in about 3 months while one of my pal got after 4+ months. Another pal got AoR just with 2 months (less than 50 days) days or so. For me, after linking the application, I got MP (medical passed). I'm now waiting for PAL and if don't hear back in next 2~3 months or so, I plan to order GCMS notes. Calling IRCC is also not bad idea.. I heard on FB posts that when calling ircc, instead of hearing the automated status on your application, select citizenship option and then once the agent/human gets the call, and your query would be for PR status, they would then transfer the call to PR agent. (PS: I haven't tried but this calling IRCC and getting to agent can take few attempts)
As for EE ITA and if your non-EE application has already received AOR/MP/PAL, then you need to really think what you want to do next. I think there were one or more member in the forum who went with EE after getting non-EE AoR.
Advantage with EE ITA is that as soon as you submit your application (assuming you have all of your docs ready), you have AOR the next day or in couple of days max. Also, your application moves faster, you will see MR/MP/PAL or ADR (if required) takes places sooner and importantly, the background/eligibility check process is quicker then non-EE.
Read this:
https://help.gcmsnotes.com/code/aor-to-ppr. The process after AoR is same for EE and Non-EE but the processing speed as the name suggest (EE) differs.
That said, some of recent last 6 month applications in non-EE (online based) are moving at decent phase. Considering the official processing time that IRCC lists for non-EE (over 20 months), getting PR decisions in 13~16 months (if lucky) is not that bad.