I think you're comparing apple and orange. NAB shares were up...

I think you're comparing apple and orange. NAB shares were up because market liked their Q1 22 sales report, also backed by a similar result from Westpac. PPS and NWL shares went the other way due to bad results. You can't compare the two and say PPS shares will back above $1 just because NAB shares did.

The comment on super guarantee going to 15% is quite a reach. The current forecast for super is to be 12% in 2028. I personally don't think super guarantee will go that high any time soon, because that would kill businesses, which will turn into votes at the election.
Source: https://www.ato.gov.au/rates/key-superannuation-rates-and-thresholds/?page=22

I do agree super is a major part of any platform. But if we use PPS's FY21 NPAT of $3m, at the current price, the stock is trading at 140x last year PE. Note that there is not a PE this year. Is 20% growth in revenue justified for that multiple when costs grew at higher rate? Investors would ask why would I invest in a stock that is trading at sky high multiple and having the 3rd best platform out of the 3 NWL, HUB & PPS, while I can invest in say Netwealth, who is trading at 60x PE only and delivered 16% revenue growth, which is 4% lower than PPS's.

I like PPS. I own PPS myself. I'm just disappointed with the recent performance and I hope I'm wrong, I think this one is going to sit in the sin bin for a while. Remember Westpac was punished for missing its half yearly result in November last year and still clawing back to the price prior to the downgrade.