It's unfortunate, but the ugly truth is that they already opened Pandora's proverbial box on this one, and I find it highly unlikely that they will ever discontinue Frontlines and Hidden Gorge (literally the only natural way it even queues) from the Mogtome events when it was always a part of it from the 2nd, if not the 1st event.

I will note that early-on I believe they gave away the same amount mogtomes regardless of if you won or lost, and did eventually cave and made it so you received more for winning. Though I personally find 3 tomestones to be way too generous when you only get 5 for winning. It should be like 2 for losing, and maybe even only 1 if you're last place in FL. And no, that wouldn't kill the mode; FL constantly queues during active hours with or without the Mogtome event. It would just dissuade the 0-effort mogtomers from taking-up spots and not even putting an effort.