Looks pretty good fueling & timing-wise, the boost tapering down is normal with stock turbos especially stock inlets & outlets so don't let that worry you. Wouldn't be a bad idea to tighten the wastegates if they're rattling any, it'll help out quite a bit with keeping boost more on-point with less WGDC. That's a solid tune-up you did on your fuel system!
Timing corrections with MHD's OTS maps are very common, it's just if timing on any / multiple / all cylinders drop more than 4*, and doesn't recover back to normal, is when you may want to closely monitor and/or troubleshoot ignition hardware.
