When you first think about what maps are good for infantry only, you'd be likely to pick maps that are good for infantry only when you play normally. I'm not sure this is the case.

Buggies are the primary concern. Most maps contain buggies or some form of vehicle, even when they're ostensibly "infantry" maps. These serve a number of purposes, but buggies in particular allow a map to become non-linear, spreading the map and making attacking possible. It is a decidedly harder job without buggies.

The biggest example I can think of for a great infantry map on normal but a pretty cruddy map on infantry only is Cerbere. Normal cerbere features a buggy for EU (of limited use), a buggy for PAC (of definite use) and a walker (often hamstrung by the limited maneuverability, but still okay). The vehicles in this map help make up for PAC's disadvantage at trying to attack uphill under bleed.

You might be tempted to say "but our breakthroughs on Cerbere are usually on foot!" This is probably true, but there are a couple of responses to this:
1. Stopping the buggies and the walker require engineers on EU who cannot go support or assault, thus limiting infantry stopping power.
2. The buggy's fast action can mean a squad can get up to a certain location and then run a lot faster. Even in situations where this buggy rush FAILS, it often strings out the defenders so that other squads are more able to break through.

On the other hand, some armor maps can be a lot of fun infantry only. When I saw 32p Verdun loading, for example, I groaned at all the running. But the round I played in there was one of the more intense battles I've come across. Yes, it requires a good deal of running in the open, but once there (and you can get there pretty easily by foot... just takes a while with a lot of reviving), it's squad on squad action that's pretty high stakes. There's no APC or walker to easily wipe out anyone who dares make a push on the flag.

Sometimes "infantry" maps aren't lessened in infantry only because one side is disadvantaged. Sometimes it's because it can make it a fairly two dimensional game.

For example, in Belgrade, under normal circumstances, if there's a standoff... or if your side has only two flags, you can often take a buggy to an undefended back flag. Not so in infantry only. Knowing this, it can often become two huge waves of players throwing themselves at each other. It turns the map into a linear 1-2-3 progression.

This isn't to say these observations are ALWAYS true, but I think they generally do hold true. So I thought I'd start the conversation by basically saying:

What are the maps you think make good INFANTRY ONLY maps and why? When you consider this, consider the effect of not having any buggies, apcs, walkers, etc. and the consequences of this other than just meaning you can go assault without having to worry about getting wiped out by a scary machine (other than xperiment).