The proteus needs more speed, yes, but IMHO this proposed change misses the mark and fails to really understand the core part of the issue.
Let’s look at an unfit T3C (prop mod bonus prop sub, buffer defense sub, primary weapon office sub, and racial EW core) from each race from the perspective of an all V skilled char:
Loki: 289 m/s speed || 5.23 s align || 170 sig
Proteus: 225 m/s speed || 6.97 s align || 200 sig
Tengu: 212 m/s speed || 7.01 s align || 190 sig
Legion: 231 m/s speed || 7.06 s align || 180 sig
When we look at the general racial rules of thumb:
Amarr and Caldari are slower and tankier, Minmatar and Galente ships are faster and more agile
Why is the proteus the second slowest ship, with the largest signature, and align times on par with the Amarr and Caldari ships while the overall buffer that you could put on it notably lower?
The proposed change at best partially addresses to the core issue, and only for non-cloaky buffer builds that try for maximum armor HP.
The proteus still fails hard at agile, kitey builds such as what would be more thematically relevant – or anywhere near comparable to the Loki as it really ought to be for those type of fits.
For the PG change – I recommend also giving some PG love to the support processor – the PG challenges should be assigned to the drone boat version for balance reasons, not to everything. I am glad to see some help in that area, and hopefully the Proteus will be a few steps closer to being actually balanced vice a gimp paying for the sins of the past.