Designed? More like a negligent oversight. And invisibility? Hardly, unless you play on low settings these days. I've been picked off by tanks from some pretty long ranges so they clearly don't have that difficult of a time seeing me. Want extra insurance against Infiltrators? Cert proximity radar as it will pick us up while cloaked. Really, these people who act like "OMG cloaked Infiltrators with AV would be OP!" seem to be forgetting all the counters that already exist against us: limited cloak duration, loud cloaking noise, scout radar, proximity radar, recon darts, the fact the cloak is NOT actually invisible... And wtf does AI specialization even mean? Every class can kill infantry easily so that doesn't mean anything. Remember, this was a class that didn't even have SMG's in the early days. But I'm sure that was all part of their brilliant AI specialization plan. What it boils down to is every class BUT infiltrators has counter play options available to them against vehicles but Infiltrators don't, and that's poor game design. That out of the way, I actually DON'T want Infiltrators to have C4 but rather some unique and class specific way to deal with vehicles. I've heard hacking vehicles won't be an option, but there are plenty of other good ideas out there.