I'm gonna think, if you have lightish tires/wheels (you do) and a 1:1 drive train (you do), you have everything you need except the motor. Going 1x or throwing $$$ at a good bike isn't going to fix anything. You have a $4,000 sub 20lb bike - its pretty darn nice as it stands, IMHO.
What do you mean by climb better? do you spend a lot of time at 34x34 and feel you want lower gearing? Is that it? You can put a bigger cassette on there and that will help a little (or change the crankset if you really want to). Or is it something else you are after?