Agamon
Adventurer
The biggest issue I'd highlight here is the potential goofiness in the narrative.
Adding a PC to the group is generally hard to justify in-game -- a good friend and partner has just died, so you go to the local pub/guardhouse/bounty hall and recruit someone roughly similar? And [/u]only[/u] one person rather than deciding that actually having a group of 10 people would be nice rather than 4? And whether you go with "lose a level" or "start at 1st level" as your penalty, it also implies that the group specifically settles for exactly one person who is generally less useful than the guy that just died.
It's not insurmountable, but it's a big part of why my group generally tries to avoid the whole thing.
Not at all, imo. In fact, the party should constantly be looking for henchman, as well (a group of 10 is much better than 4, you're right). And higher level people are tougher to find than those of 0 or 1st level.