Michaelhinchey, First lesson to learn; not every change is an upgrade.

Changing from 10S to 11S is stupidly expensive requiring shifters, chain cassette, and a new free hub. You can modify your present gearing when needed with a different 10S cassette and perhaps a chain.

Making a bike fit more comfortably is always the number one requirement. Money spent for fitment is often well worth it.

Ask any cyclist what they'd like to improve on their bike and a popular answer is for it to weigh less regardless of how much, or little, it weighs. My experience is that weight cutting is best utilized on wheels and tires. The drawback is that light weight tires have less puncture protection. Unless you're running with the A group of club riders, you're probably fine. Factor in your body weight and even one pound less on the bike itself makes little difference.

Brad