I think the siege mechanic + gun cooling thingy is just a mismatched mechanic for the Type 71, just like the reserve track mechanic is wasted on Yoh tanks. If they buffed its alpha to at least 420 (that is minimum, more would be better) they would make the gun cooling worth waiting a bit more and also reduce the overall time you need to adjust that awkward siege mechanic. Keep the overall DPM intact. With just 400 alpha you are incentivized to maximize DPM instead, which makes you treat the gun cooling mechanic as first shot acc bonus and force you to play with siege mechanic too often.