Marshall is far more skilled than Lacy was, her long jab and switch-hitting ability will make her a problem and she`ll use southpaw positions tyhe way Calzaghe did, Shields is nowhere near Calzaghe`s level, that was a poor comparison.
Sorry but imo you are wrong on this occasion. Marshall is clearly out of range when moving laterally to cut off the ring. In this instance crossing the feet is acceptable to allow quicker lateral movement to cut off the ring. If you watch closely when in range the feet don't cross which as you say is correct; however, cutting off the ring is a big part of her game and if crossing the feet allows this, when out of range, then it is a solid strategy
This content is protected In this clip you can see that golovkin a master at cutting off the ring brings his feet very close together and even crossing to help lateral movement when out of range. Mathyse is even more pronounced. If opponent has faster feet as Herman's did then you need to move quickly or end up chasing if crossing allows that when out of range then it is a good strategy and deliberate: not a mistake technically.
When Golovkin and Matthysse step to their left, their left feet are moving first and their right feet are following. When they step to their right, their rear (right) feet are moving first and their lead (left) feet are following. When they step forward, their lead feet are moving first and their rear feet are following. When they step back (I'm sure you can figure out the rest). That is boxing. Sometimes their feet come close, as all fighters' feet will at times, though that appearance is also partly attributable to shifting camera angles. What you're referring to is not the same as what Marshall is doing. Bringing her rear foot first and crossing it all the way behind and past her lead foot does not allow Marshall to cut off the ring any more efficiently or fluidly, all it does is momentarily compromise her stability. If Hermans has fast feet, as you say, she can potentially observe and check that habit with a timely dart into range while Marshall's balance is compromised.
I stand corrected. Although, I'm not sure that her right foot is always moving first just that there is a very pronounced cross of the back foot. The video of Marshall is edited and I would have to watch the whole of the movement to judge if it is definitely the case. You are clearly more knowledgeable than I re the technical points of boxing I just didn't think that on this occasion that Marshall is showing a technical flaw and that it is a deliberate tactic to cut off the ring more efficiently. However, your explanation makes sense so like I say I stand corrected and have learned something.
In that particular sequence the editor highlighted, that's what she's doing. My snark was squarely at the editor touting it as something it isn't, i.e. a particular skill or beneficial maneuver (typical of these YouTube 'film study' analysts). I didn't really want to get into conjecture about whether the misstep was conscious or unconscious (because it's by the by), but, if pushed, I'd say it comes off somewhat like a presumptuous flourish, a kind of prowling strut as if to signify dominance/control/superiority — speculation on my part, admittedly, which is why I didn't mention it prior to this post, but, eh, look at very early Eubank Jr. for one example, he had a (less subtle) tendency to throw in impudent but pointless/ineffectual flourishes when he was dealing with opponents who didn't have much to offer him.
True or not true, what does that have to do with what I said? Literally nothing. But thanks anyway, Mark.