Such a situation forces antags to learn how to go around something. If I have four security borgs against me, then I will not sit at maint doors hoping that a random greytider goes in, instead I will instruct my thralls to lure individuals DEEP into maintenance where it will take security longer to respond should I be discovered. The issue with antag players currently is that they do not plan ahead, if I'm going to storm the bridge I will emag my escape route doors and ensure that I have an escape to space with a hardsuit ready whereas most players will just dive the bridge and hope for the best. Prep work is key to becoming a good antag, it's not all how fast you can push over that seccie chasing you. Another big part of it is creativity, if you do something unexpected it's much harder for security to react properly.