I don't care for the slingshot method to release the slide. Cost me time and control. Yondering, what issues does the slide release cause in your experience?
Mainly bumping it to lock the slide open when firing. Sure, that doesn't happen on a square range with the right grip, but if you train for and intend to use the pistol in times where you don't have the right grip, it can be an issue. Like I said, even if it's not an issue most of the time, it introduces a potential failure point that doesn't need to be there if you change what you do, instead of changing the gun. As some like to say, it's a mechanical solution to a software problem.
Learning to rack the slide after inserting a mag makes your reloads the same drill as malfunction clearing - tap rack. That's not a slingshot grip either, use an overhand grip. It's faster and stronger, and not difficult to learn with a little practice.
I have not used the Ghost forward extended version, but still don't see the need for a slide lock that sticks out if you're not playing race gun games.