I wouldn't. Leather seats with cut-outs are starting to appear on the market. To my eyes there isn't enough of a cut out in any of them to justify the gesture. Probably just trying to cash in on the current affection for anatomic saddles. Leather saddles can be comfortable without cut-outs. It doesn't sound like your problem is the lack of a cut-out anyway, you need to break in the saddle and that is a different issue altogether.

H