I've already given an explanation, you completely ignored it. The burden falls on you to prove he would fire his shots at full speed. Furthermore nothing suggets he could percieve ENW's shot whilst it was firing, he merely looked down at the aftermath after his device had already been destroyed.
No, Iaian's arm is directly behind his body when it gets blown off. If Iaian dodged his attack completely that arm would still be intact, since otherwise a good deal of his torso would also be blasted off. What that suggests is that Melz blasted his arm off before Iaian even moved, then dodged out of the way after the attack had already been conducted. Furthermore, again, how does that help your case? Melz not going on the offensive for the majority of the fight means he's not putting much effort into his strikes, that is the clearest and most obvious meaning behind his statement. Melz didn't have to get serious until after they found his weakness, before that he could just relax and allow his Regenerationn do all the work for him. So again I ask,, what suggets he was using his full speed at that point if he clearly wasn't using his full power?
That is so beyond the bounds of reasonability that its almost not even worth addressing. All I'll be stating is the obvious, which I really shouldn't have to explain. Just incase it does need to be stated; Any and all information once present in the Webcomic that is completely absent from the manga is to be disregarded, since the webcomic is its own seperate canon unaffiliated by Manga and is no longer main canon. The only reason we use any of it at all is for the stuff that hasn't come out yet, since its going to take ages for most of that to come out yet. Direct Manga scenes that contradict the webcomic absolutely take priority, since under all evidence it simply means that part is no longer applicable by ONE's standards. The burden, once again, falls on you to prove that its still applicable.
That logic doesn't make the slightest spick of sense since aside from the only relevant part of the machine that would increase its reactions is its sensors, but the Brave Giant quite clearly has A.I. to begin with. Furthermore, I would quite confidentally call this a blitz, unequivocally. The only reason he got tagged was because he got caught on some magnifying field, which is literally the only hit he managed to get on him outside of the MEN.