As a uncut man you know that the foreskin has a sort of rolling and gliding action. That means that there is less friction on the vagina. More important a tightly circumcised penis works sort of like a piston, it plunges in deep and then the ridge at the base of the head sort of pulls the lubrication out on the outward stroke and with a extended period of intercourse can cause some dryness during intercourse and soreness the next day, just to much friction.
Also since I have restored my wife seems to produce more lubrication. Short strokes with the foreskin riding back and forth over the edge of my head right on her G spot seem to turn her into a virtual lube machine. That never happened before I restored.
As far as controlling when you cum try being tightly cut for 40 years. As the layer of callus on the glans gets thicker things change. I have found that after regrowing a foreskin sex feels much better and I can control when I cum much better. That has been my personal experience and a lot of other guys that have done foreskin restoration seem to say the same thing. Your mileage may vary.