These threads seem to be popping up more and more. General complaints about this feature or that bug.
Considering the great success I have had in finding fortress embarks on the basic worldgen settings (I use the second highest mineral scarcity option) your complaints seem awfully misplaced. If you are having trouble finding proper embarks, ask in the worldgen cookbook thread or simply take a few more minutes to search for that perfect location.
Finding an embark is no easy task and takes some skill - parsing through the various menus and regions is convoluted in the current state. However, it is still rather easy to find an embark with everything - coal, iron, flux, most every metal, and no aquifer.
Find some patience, use the search function to look for multiple metals both shallow and deep, and you will soon have your reward.
And please for the love of god don't ask for a petition. Nothing is more silly than your own personal issues being falsely presented as a global problem that everyone experiences. I don't mean to dismiss the possibility that bugs could exist regarding metal placement during worldgen, but more often than not those issues are noted in the few weeks after a new release and threads like these serve to mark those who don't use the forum search function.
Sorry, it's my personal problem that color coded layers do no longer exist and it's impossible to know what embark i'm getting into without downloading dfhack?
I've embarked more than 10 times on multiple shallow metal, multiple deep metal and flux stone locations. i'm not mentally challenged, i can use the search function. There was nothing there, i wasted probably 10 real hours stripsearching the sites in puzzlement.
Then i used dfhack to check the search results tile by tile and it just confirms that there's 50k silver in every 4x4 embark and no iron. Sure, there's about 4 little clusters on the map that have magnetite and coal. Do you have any idea how low the chance is to accidently embark on one of those without prospecting search results? Mineral scarcity doesn't change this, it doesn't magically make coal and magnetite appear in layers where it can't spawn.
To influence that, there would need to be an option for more sedimentary layers, and to FIND those without mods, the color coded layers on the embark screen need to come.
Reliance on mods and hacks to be playable is elitist crap that keeps new players (and new donators) locked out.