A few things:
If you use a soldering iron, you can make your own grip stippling on either a 1.0 or 2.0, that is IMO better than the out of box 2.0 . I have a bone stock 1.0, and a another 1.0 that features stippling and a cerakoted
slide (which is easier to get a solid grip for cocking the slide. Is the cerakote worth the extra price? Maybe not but it is a slight noticeable improvement. The stippling though, thats a major improvement.
Second, while 2.0 has a better trigger, its not all that much better. Got a Apex kit for it, the Duty version, but not yet tried out.
There is also the Burwell trigger job. A gunsmith published a .PDF file of about 50 pages, on several different things you can do at home to improve and lighten the trigger on the M&P. There are even instructions for shortening overtravel and reset too. He has dissassembly instructions, and has instructions for 6lb, under 5lb, and even 2.75lb trigger pulls. And then reassembly is covered too.
I personally don't think its worth swapping from a 1.0 to a 2.0, there's not enough difference to bother with if you already have a 1.0. But if you don't have one and wish to buy brand new, sure go 2.0. Or, save a few bucks and buy a used 1.0 range kit off the EE, stipple the grip yourself, and download the Burwell instructions. Or buy an Apex kit if truly don't care for those prices.
Finally, I had been using the finger pad for trigger, but the last two times at the range I tried using the old "double action revolver" technique by putting the trigger right between the bones, right inside the joint. Suddenly my group sizes shrunk 30% just like that, on a stock 1.0 trigger. No I'm no pistolero expert, but something to try out. I think this provides more strength to pull that trigger, in effect making it like it was lighter and smoother than it actually is. Sorta, maybe.
Just do a search for Burwell M&P and one of the links will be to his .pdf at his website. Soon I will try it out!