The strength of the build relies very heavily on the fact that queens can transfuse a +1 armor spine crawler, which has good hp and dps. But that's the strength of the build. If you can sidestep the static defenses, this build's power is severely weaken. Warp prism play, nedus, medivac drops are are all viable because Spanishiwa build doesn't get gas till the 7min mark. It isn't a fragile build, but it does have some gaping holes that can be exploited.
And just cause you rip a build doesn't mean you can copy it perfectly. I saw the TLO vs Spanishiwa Game 7 match where 7 roaches, 10lings and 6 queens took on 1 thor, 2 tanks, 2 filled bunkers with a few extra marines with scvs repair support. The transfusions going on was INSANE and it won him a battle most players will just get splattered.
Macro and micro wise, I do respect Spanishiwa for making a race that people has been saying is "very reactionary" into something "all rounded". Mass spines/queens will hold off most types of pushes but sacrifices offense for that but it does allow for someone to transit quickly into Tier 3 zerg which most Zergs totally ignore
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