Truthfully, the proliferation of suits like the Hauberk and Grenadier make me wonder how successful any mech assault into an urban area's going to be going forward. Mechs are expensive, both in terms of BV and in terms of Cbills. I just don't see folks being able to put enough mechs in a city to counter the numbers of BA, scary PBI infantry outfits like the Stalwart Support LRM Infantry, and the speedier PA(L)s available as spotters. Perhaps if they go in with the plan of demolishing the city as they approach...