im going down the rabbit hole of crank case vacuum pressure usefullness

now ive effectively removed any vacuum from my pcv system by fitting an oil catch can to my rocker cover vented to atmosphere...

few questions

1. any noticable loss in power/performance/efficiency in the gti6 engine by removing crank case vacuum?

2. is the crank cases pressure/air space shared with the rocker covers pressure/airspace by other mains than the external pipes? i.e. through the block/head

3. if the answer to 1 is yes and 2 is no.... could refitting and repurposing the cam powered brake vac booster pump to soley pump air out of the crankcase be an option?

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