Is it just me or does the "End of Mission" rating system not reward stealth, but more time?
S and even A are given too easily. Should only get an S if done completely stealth, no alerts, no kills. Now I have gotten A doing this but still, the fact you can still get an A and even S for going guns blazing.
I'm not too far into the game, but from what I've seen they created the system to award both action and stealth players.
There are two major sources of points, one is time, the other is all the extra stuff like no kills etc.
If you go all out action, you better do it fast to get a S rank.
If you go stealth, you can take your time as you get the bonus points.
I got S rank for mission 13 etc. on first try and usually I get more bonus points than time points.
I think no-alarms&no-kills usually nets 10k+10k+20k (you get another bonus for achieving both at once) points alone. It also fits more my playstyle and I have some time to collect tapes, gain more heroism from holding up all the guards etc. (plus I guess you don't grow your horn for shooting everyone if that as any impact on stuff?).
edit: I also turned off reflex mode in the options, I think that's 10k? Maybe I should reactive it to make my playthrough less punishing.
Also, IIRC PP is much more lax with punishing for using continues than PW/GZ. You get a 5000 points for not using any continues, after that use as many as you want. That's only a small bonus and it doesn't impact big ones like the ones above.
Because of this I even started to save in between the same outpost by doing what I want to do w/o getting caught like fultron our good soldiers/hostages, planting C4 on the radar etc.) and then run out of the outpost "zone" to have it save all that progress. Then go back to do the actual mission objectives etc. (so if I get caught I won't have to do everything again).