@OldTreeCreeper reading all this and the link hayhor sent how I understand the system:
You have two major sections - kill-based RP and placement-based RP.
Placement remained the same as in season 10 = maxing out 100 RP for the 1st place.
Kill based now contains two subcategories:
a) per skill level fixed RP
b) per placement based kill multiplier
And both a and b together are capped at 175 RP.
And the difference is that the old system included placement factor as that increase kill multiplier - the higher you place the higher was kill multiplier. E.g. 7 kills with 7th place would give you 7 kills * 12x multiplier = 84 RP.
Now 7 kills give you 21-140 RP fixed + 7 kills * 2x multiplier per placement. So e.g. if smurfing and being B4 you kill all platinum players you get 140+14=154 RP, as per Apex that happens rarely so if you kill your level ppl 70*10 + 14 = 84 RP which is kind of comparable.
Yet given above said at this point I understand 7 KP is not capped instead total RP per kill-based section is, so you go in kill 12 people even of your own level and finish 7th = 12*10+12*2=144 RP from kills + 20 points for placement = 164 RP which in the old system would be possible only if you would have max 6 KP and finished top 4 or higher, that clearly shows that this system favor kills and players who are more kill oriented, hot dropping than placement, tactical players who evaluate risks and do not push everything.