When i got my Crossy a few months ago, i found she wanted to climb the revs fast and i ran out of revs very quickly in 1st n 2nd......
At the end of the day YOU control the gas pedal....
Find a bit of quiet road, and try going gentle... as if youre driving your granny....
1st to 2nd is generally notchy witb these machines.... I ASKED THE SAME QUESTIONS as you too....
I found.... go gentle as you get used to her, let the revs drop b4 2nd gear and dont rush the box....
You have a fabulous machine now, and she will drive beautifully when driven sedately and still impress you. i want my g-box to last and take the changes slowly..... but climb the revs fast...you'll get used to her...... once the clutch is up and youre in 3rd.... you can plant the gas pedal as hard as you like and have enough time between gears.

Even going up the revs slowly, you will still accelerate like a bat out of hell....
You got a Super-Car now and the acceleration to match......
Have fun.