I also really liked issue 4. As far as total reimaginings go this is one I'm enjoying. It's not perfect but there are more positives than negatives thus far. I'm pleasantly pleased that it's only a 4 issue intro arc instead of the more common place 6 issue opener that the industry obsesses over. Looking forward to seeing how Raph integrates into the fold. Being away for 18 months will only help in his characterization as the loner/badass I think.
Glad to have the one shot "micro series" next week!! That buffers the wait between issues.