You do what's right for YOU...not what I think, or John, or whoever thinks. Ultimately it's YOUR gun.
First, let's be frank on HK hammer-fired triggers in the USP/P30/P2000/HK45 series. You don't hear the words "smooth" or "crisp" to describe them very often. The SA in all of them are like an OEM Gen 5...not great but good enough to not be a problem when I'm looking at other redeeming features that I may value.
Now to the LEM...first, what gets people into trouble with shooting pistols and triggers?
- Pull weight?
- Inconsistency?
- Extra trigger movement/travel?
Well, depending on which flavor of LEM you pick, you get to add some of each in varying levels. If we get into the weeds here, adding these complications to the trigger press ultimately requires more input from the user, and now the capacity for error increases. I do believe it to be a technically more difficult trigger to master due to the aforementioned characteristics with no redeeming mechanical properties for the user to exploit.
I also don't think I'm alone in this. You've got a wide array of shooters here with DA/SA guys in the know leaning on the CZ, Beretta, and some Sig P series guns sprinkled in. There's no shortage of worked up Glocks, Sigs, Walthers, and even some HK's on the striker end of things. And you've got the 1911/2011 crowd with some fringe cocked-n-locked types. The number of guys willingly gravitating toward the LEM is pretty small, and those that do are leaning on it for something other than performance economy.