Eh, there might be other ways to lance that pontoon, but yeah, i don't think our chances are good.
Still, do keep in mind that a broken army will be a problem for the Victorian state.
Yes, they could give them the opportunity to learn from their mistakes, but they can also get Russian Trainers and surpluss to make up for their loses and a last stand story can work to increase the patriotic fervor.
The broken and savaged army managing to disengage and return (and I do expect to be as savaged as possible) with talks of how (one of) the CMC divisions died like a bitch?
That is a problem for the victorian leadership, if they are too harsh with the men, that will cause morale issues, the officers might be more vanishable, then again the officers might be aware of that and plan accordingly (a smart enough officer to learn from their lessons might be smart enough to know that the victorian leadership is going to need a scapegoat or two, and while they might be able to keep the officerdom shut, the soldiery by and large will talk and probably talk shit of the CMC and their officers
So, what would the victorian leadership do in that situation? discharge all surviving divisions and replace them with new, reliable, folks? I mean, they probably can, specially since we really can't go to the offensive in the short or the medium term (I mean or troops are crap atm, and we don't have enough of them to take AND hold) so the vics have the time to rebuild and probably have the access to stockpiles, theirs or second hand russian cast offs, to do so AND they might have the manpower (at a cost, obviously)
But just by defeating them we have broken their image, their survivors could break their self image and that would be a net victory for us as well, even if some learn a bit of lessons out of this...
You know what? we need to make a propaganda war, make a Tokyo Rose of a sorts, play music the victorians like and talk crap of their state at the same time, it might even work if their morale goes south enough