I thought the last issue was better than the rest but I'm not buying it.
I think the negative/positive lightnings were a good idea because it gives a better explanation IMO for Flash to be red and yellow and especially for Zoom to be completely yellow. Even if, in this case, it would make more sense to have the good guy with the right lightning color ...

I could help myself thinking "Wow, it is the Flash" looking at the great panel of Wally running toward the Speed force.
Not sure I like Barry being [BLACKOUT]the origin of the speed force[/BLACKOUT], it definitely puts him in the place of the one and only true Flash.
I did not understand much of the Pr Zoom talk ... "I push you in the reverse future for you to come back after I was being not born because of you" ....
Nevertheless, the whole yellow/red thing made me think about kid Flash. I have never liked the suit of Kid Flash half yellow/half red, I think it was stupidly ridiculous. Anyway When Bart became kid Flash , I thought it would be fun, because he was half Thawne (yellow) and half Allen blood (red). So I think it works fine to have those red lightnings and these yellow lightnings.
Well this last issue was better IMO, but I'm not buying Barry as the ultimate Flash. Every time I see Wally, I think "hey it's the Flash". There were no real need to bring back Barry.