Nice idea, but somewhat time-consuming and expensive for TFP to do as they would have to optimize and balance the LBD system as well and if the "player base" would then want perks back they would have to scrap all other work they have done in the meantime and integrate that with the perk system again. Also they could not add bandits at the same time as that would influence the vote as well.
Maybe a better way would be to actually provide two versions, one with perks and one with LBD. So everybody can have what he wants. Drawback is that TFP would have to support both versions.
(Actually we have two versions available, one with perks and one with LBD (DF). But for some the availability of a mod doesn't count)
Oh don't give me that, if a single modder can do it in a short time (less than a week working an hour or 2 a day or so), tfp has no excuse. Darkness Falls completly tosses vanilla's stat system in the garbage (where it should be imo) each alpha, and I believe its very easy for him it implement it everytime the game updates. This proves the coding to support it still exists from when it was in a16.4, if it wasn't it'd be much harder to be put in, still doable, just be more work, going from a16.4's system to the a18 stat system was probally way more work than if they just fixed the 2-3 issues with the a16.4 system, yet instead of fixing the few small issues it had they decided to redo it from scratch.
As for balancing it.
skill levels 1, 20, 40, 60, 80 are level 1,2,3,4,5 of a perk like pummel pete, miner 69'er, motherload etc. To balance headshot damage. look at what the bonus is at 10 in the stat, and set it as a range from 1 skill to 100 skill. with 0 skill being equil to 1 stat, and 100 skill being whatever the stat at 10 would have (this can be done, many aspects of the game already use this system). You could also make the action skill give a bit of damage, and a bit faster reload that stacks on top of the perks, but that could come later.
The point is just because mods exist aren't an excuse for the devs to bascially ignore what the playerbase. I'm tired of 7dtd devs using mods as a excuse as to why they don't have X feature, give us a real reason. Your not making a game just for yourselves devs, your making it to try to appeal to players to buy it, need to learn to cave on some things for the sake of players.
Good example is the whole needing farm plots, Devs say its because you can't hoe the ground due to some technical reason with the way the game handles biomes or something (I forget exactly what it was but it was along these lines), yet multiple mods have shown it can easly be done and it works fine. Whats the excuse now? As your technical reason was just debunked since modders were able to do it without a problem, calling it a "hacky" way doesn't matter, what matters is it was easly done, by some modder in his home on his own. TFP in this case made a choice, thats the only reason it "needed" to be changed. BTW DF also has the farm plots, you can use either way to grow crops, either hoeing the ground or using farm plots.. See players like choices? Some like the farm plots in DF, me? I just hoe the ground.
One of my biggest gripes is TFP keeps removing choice from the player, A21 with the sex t-rex thing is a prime example, why not add it to the weapon lines as they did, but also leave sex t-rex in? so players could choose to invest in sex t-rex to get all around stam reduction, or could choose to ignore it and focus on their chosen stat/weapon. I know what i'd choose, I'd choose to get sex t-rex in str, as its more efficent, as even maxing the stam reduction in ONE weapon or tool line now costs over double the perk points maxing sex t-rex used to cost that effected every weapon or tool. Its just gone from being efficent to super inefficent as hell from a20 to a21.