This is kinda how it worked in 4.x and lemme tell you 5.x version of mch is way more interesting throughout instead of just for 10 seconds.
Dnc's version of it is more interesting than HW/SB MCH way of doing it. DNC If you miss the first proc you can still hit the other button instead of just hitting the same button again because you had bad RNG. The bullets plus rng three part combo wasn't that interesting of a mechanic in SB it was just there to get in the way.
It did add a layer since now you have to make sure you don't delay your big damaging attacks with your rapid fire combo promoting you managing heat well since the only way to get rid of heat now is to use hypercharge. Air anchor just took the place of your every 60 seconds attack.tbh the tools (Air, Auto, Drill, Bio) really didnt add much to layer out MCH in a interesting way or impactful way. along with queen its pure style and no substance being the only link to MCH core gameplay loop is naught since wildfire is reduced to a beta weaker and less frequent Tsubame-gaeshi. Least Auto is linked to heat without literally its only benefit leaving skills like ricochet as lateral as flamethrower.
Battery added depth to our turret so now instead of set it and forget it you use it during high damage windows (Trick attack or every 60 seconds). Hypercharge became our rapid fire and essentially makes it so we are pressing rapid fire more frequently than before. And even in SB you were always in your heated rotation since barrel stabilizer was meant to bring you to 50 and heat blast was there to make sure you dont over cap before wild fire was up again so really heated rotation were never really earned or savored it just became your normal rotation if you were playing optimally.Gauss barrel was pointless to a fashion and wouldve been easier just to replace it with a trait at 52 since it really is a fragment of HW MCH, but was a much better gauge skill than what we have now the battery is a shackle to what we used to have free control over and heat is a remedial resource since it only is used for rapid fire which no longer exists on our rotation and trivializes the heated rotation, what used to be earned and savored, to smut thats mind-numbing in its ridiculousness. Im very passionate about MCH so i hope what they do EW breathes fresh air to MCH not stagnate it to even more pointless fodder and false sense of speed smothing out mechanics with ogcds
SHB MCH is a way better incarnation than SB mch since it actually keeps you more engaged with you constantly going into rapid fire and having big hits that you can look forward to the entire rotation. This coming from someone who also enjoyed SB MCH it was not that good of a job in that expansion.