Yes, even I thought so. I hope the paper process gets better and quicker. Should be given an opportunity to convert to express entry. Hope OINP selects us through Federal skilled category based on offers.I am not sure, but I think that if you get your nomination, you cannot leave the employer who supported your nomination till you get your PR.
There is not invitation to PR nor Express Entry. With your nomination, you should apply to PR by paper to IRCC and wait 12-18 months to get approved. Meanwhile, you have to apply for the bridging Work Permit.