@albarkhane I guess as the 2nd-best finishing Paradoxical player I'll chime in - I think PO was well-positioned against Shops, Dredge, and random Blue decks. But there was a fair amount of Null Rod/Stony Silence and you need to be prepared for that.
In my case I had Oaths main, so you can just attack with Griselbrand a few times. I also hedged with a Beast Within and an Echoing Truth maindeck, along with Abrupt Decays in the board to deal with those answers.
I don't know if I would have felt as comfortable playing just PO at this event, though I've run TPS back before Dark Petition was printed which had similar (maybe not as bad) weaknesses. I do think it's critical to have a plan for the artifact hate and to build your manabase carefully, which is why I dropped red and played basically BUG.