@BobBobster I've installed High Sierra on nearly the exact same hardware you have (except I use a non-Ti 1050). In testing sleep just now it takes slightly longer to go to sleep but wakes up instantly on my system. As far as the lag issue, this is not my daily driver so I don't have it on all day long to see if it has the same problem you are experiencing. So if you haven't moved to HS yet it may be worth a try especially once the .3 update comes out in a short time. Use a clean HDD to test it out first.
I should also ask both of you which browser do you primarily use ? Chrome, Firefox or Safari ? There are thousands of posts from people having these kinds of issues with Chrome. Just try search and see the results. So it may not be specific to just this hardware.