Please don't tempt faith (and the QM) like this...
But seriously, I do not agree at all with your assesment here. He has superior artillery and arguably better cavalry than us, we have the infantry advantage. His army is quite formidable, especially with the reinforcements he got. This is far from over, we can still lose this. Given the strengths of our respective armies, an infantry slugging match with no artillery support would absolutely be desireable.
At least respect his artillery, right? That amount of elite artillery can basically delete one of our units in one round if we are caught out of cover. If we allow him to set his artillery up, he can basically freeze us in place, since any movement out of our cover can be punished harshly. This is why I am still nervous with your plan, which involves setting up in open ground in the center.
And I do not see a scenario where this turns into a Brutet-like slaughter, unless he does something seriously stupid. He has enough cavalry and artillery to easily cover his retreat, if it comes to that.