Yeah, I switched over to Promix HP+ during COVID and while I only bought two bales, they were totally fine (I get mine at a greenhouse supply company, rather than a traditional retail outlet. Call 'em up, request what I want and pull up to the loading dock with my car.)
On the perlite, I guess if you're looking to water more often, adding some would work. As it is for me with 5g bags, I feed or water every 4 days which means I can still hand water and go away for long weekends if needed. If I didn't have stuff like that to do, I might add some extra and knock that back to every other day or every 3 days.