Well, i found the “problem” is on r.TemporalAA.Quality.
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Quality of the main Temporal AA pass.
0: Disable input filtering;
1: Enable input filtering;
2: Enable input filtering, enable mobility based anti-ghosting (Default)
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Looking at BaseScalability.ini, TemporalAA for Epic and Cinematic is set to 2.
That yes, ghosting is decreased, but lowering the AA too much.
Setting 1 for Epic and Cinematic get the good temporalAA im looking.
On 5.1 I see is the same on 5.2, Epic and Cinematic is set to 2, but que quality is very good. So in 5.2, there is something wrong or they changed what r.TemporalAA.Quality=2 does, decreasing the amount of AA to decrease more the ghosting too.
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I copied the temporalAA.usf from 5.1 to 5.2 but the problem persists, due i saw:
#elif TAA_QUALITY == TAA_QUALITY_HIGH
#define AA_FILTERED 1
#define AA_DYNAMIC_ANTIGHOST 1
That i guess is what TemporalAA.Quality=2 refers, but is the same. So Epic/CInematic scalability on TemporalAA does something different in 5.2 than in 5.1 but cant find what it is. Or maybe in 5.1 the Quality=2 it really did nothing / nor worked due WIP or something and now does what it should do ¿?.