Of course, in 6e an attribute of 2 isn't supposed to be considered a dump stat. So if you DO dump Charisma, it's necessarily a 1 because you can't have a 0!
Partly for this reason (but not entirely, I still did this in 5e) I like to alter the understanding of what Loyalty represents slightly. Rather than being a measure of how much the NPC likes/loves/will defend you, it's a measure of "How Illegal" will the NPC be willing to get with you.
If you're Charisma 1 or 2, are barred from coming out of chargen with a spouse or other very loyal friend? Of course that's not what the Loyalty ceiling means. But then again, spouses (and other relatives, college roomates, playground playmates, etc) aren't typically the kinds of contacts a shadowrunner has, now are they? Presumably, if you're happily married at any rate, your spouse should be a "Friend for Life". But does that mean your spouse will help you dispose of a corpse? And then keep quiet about it rather than calling the cops first chance they get? That may be a realistic activity for a career criminal, but it's not a realistic activity for your typical married couples

I've never actually put words to a chart before, so here's a crack at translating it to how *I* personally grok Loyalty ratings as "willingness to indulge in criminal or risky behavior for your benefit:
"Just Biz" = "I won't tell on you, if what I find out about you isn't TOO bad"
"Regular" = "I'll bend the rules for you if I'm reasonably sure I won't get caught"
"Acquantaince" = "I'll do it, if you make it worth my while."
"Buddy" = "I'll help you bury that body, but you owe me one!"
"Got your Back" = "You had me at 'Get in, no time to explain'!"
"Friend for Life" = "The duo that slays together, stays together!"