I dunno, I'm not sure how I really feel about LEB's treasure/parcel system yet. I admit it's easier for building higher level characters, but it seems to have other properties that I consider flaws as well.
For example, I know there's been a certain amount of discussion about wishlists over here before. Well, in looking at the "wishlists" on LEB, it seems like many of them are less wishlists and more orders. They aren't just a list of items a person might like to have. Often it's more like a shopping list: Level 5 parcel: xyz item; Level 6 parcel: gold, Level 7 Parcel: whatever weapon; etc.
It also seems to phase out the "random" parcels more. By that I mean, the way I read the DMG, there should actually be a total of 10 parcels for a party per level: 5 items, and 5 that are gold paired with other things, like precious gems, potions, or scrolls. My, admittedly limited, experience with LEB thus far seems to eliminate those other 5 parcels all together. People are just given enough gold to satisfy the 1/5 their level item requirement to do with as they please. I think this eliminates some of that flavor.
I have to admit, DMing my first game over there, I really wanted to put some of that more flavorful stuff in, but I feel like I can't; where-as I feel like the way treasure works in L4W, things like that would fit in better and be better received here.
You may ask, "Why do you feel like you can't do that?" Well, because things are stricter, from what I understand. If my NPCs hand out gold to hire people (and it's hard to motivate them to take an adventure otherwise), then that 1/5 an item of their level is used (or at least mostly), which doesn't leave any room for those flavorful treasure finds without eliminating someone getting their magic item, which they may not be keen on.
Besides that, I think the work involved in having every PC in L4W re-tool their items and need to be re-checked is too high for the time the Judges currently have at their disposal. I know that the approvals process already gets easily backed up. I can't imagine what would happen if every PC in L4W needed a recheck.
As for the retirement rules, I think they're ok the way they are too. The idea of feeder PCs was addressed when the new rules were created. I understand that you're looking at it from the perspective of your other proposal passing, but you I think the arguments that applied previously still do. It takes a good amount of time to level a character from 1 to 2, so it's not likely people will just make "feeder PCs" all over the place. Also, keep in mind that you can only "feed" half the exp lost. So, if you sack a level 4 character and replace it with a level 3 character, you only get half of the 1 level's exp.
Just modify the rules to state that if you sack a Level 2 character and create a level 5 character (because you have one at level 6) you get no "feed" exp from the level 2 character because your new character is higher level than the old. I think that should fix the potential problem.