Yo Cookie, This is what I'm gonna send at you.
Pets
Zone is a Social Game, Its not like all wars and stuffs like that, so having pets around is OK. If the owners want to let them act like a nuisance,let them be,its they who are wasting both time and energy anyways.
Jobs
You might have forgotten about the restoring health bug by killing yourself with an explosive or non-player character which will reset the Bounty. Players who mostly do this are mostly Streakers. Second, if jobs are removed, you'll be expecting to see more players on the PK-Zone with AP Rippers, spamming and killing those that are weaker than them, especially new players. Let me focus on the word I just said, New Players, you didn't even think about them only having a ER Beamer and a Knife as a starter weapon, and when Killing is the only job, they will be at a huge disadvantage.
I got not much to say about Trading Tables, so I ain't gonna comment on that.
For Gun Diversity, I'll leave that to GIT (Ghettoicedtea)