The lack of a touchpad button should only be an issue during KOTH matches, where you can't fullscreen since it's bound to the touchpad button. During training, make sure Delayed Pause is enabled, and you can just double tap Options/Start to restart.
Also, as far as Fighting Commander pads go, there's a newer model of the FC4, called the Fighting Commander Pro, that's available for import. Doesn't sell on Amazon until the 14th, but you can find them on eBay now.
I ordered this, not realizing it was the Pro. It's the same pad as the FC4 for the most part, but now includes an actual PC mode for X-Input. It's also confirmed to work on PS4 Pro. If you're going for a Fighting Commander pad, avoid the symmetrical models, as the d-pad is very stiff and loses sensitivity very easily. The FC4's d-pad is fantastic overall, and doesn't wear out as easily, though the lock mechanism is known to go bad over time. The FCPro, from what I hear, is apparently fixing the issue. Since it's an import-only atm, it's pricey, but the FC4 is probably the best fightpad you can find on the market, period.
@BigMacMcLovin