#1 is actually listed among the things to not try suggesting, because it's automatically denied. #2, when taken into consideration that it's meant to go along with #1, would mean a ludicrous effective x8 rate increase for low-level sets (and regarding it balancing things between PvP and PvE, where does the need for two separate activities to be balanced comes from?). #3 seems to assume players don't know low-level Battlegrounds and need to be informed about them, which I don't think is the case, or that they need to be bribed to do it, which would indicate they don't care about doing it and will just do it for the rewards and stop as soon as they got what they wanted from it.
There's a reason why low-level content is dominated by twinks: Icecrown is a high-rate server, people playing in it are interested in high-level content and want to rush past low-level stuff (or just want the high population, but it's still their choice to pick the trade off of lots of players without slow progress). Instead of trying to tweak a server that is clearly suited for players who want to skip low-level content, you should instead try Lordaeron and its even pace of progress. If even there, where people supposedly want the full slow leveling experience, you still won't find low-level PvP, perhaps the amount of players who want that just isn't significative enough.