While all these address certain problems, the majority of voters for the AfD don't see these as their core issues for what they're voting. I do not see a solution as to how to get blatantly racist and often one issue voters back on the ballot for less extreme parties.
I'm not saying the changes you're proposing wouldn't help and wouldn't dent their numbers, but I'm very, very weary of the fact that being an open Nazi has become acceptable in large swathes of the population again. Not just that, it actively increases attractiveness of certain politicians in the polls.
COVID and Trump-Era Republicans (as in the CxU and AfD taking their playbook and finding plenty of success with it, didn't they even meet with DeSantis to pick his brain?) did an absolute kickflip with rationality by marrying far right ideology with anti-covid, anti-science, conspiracy theory rhetoric and opening up a huge new voter base.
It's a super complex issue ranging from our Cum-Ex chancellor to Otto Normalo feeling disenfranchised by foreigners, who we desperately need if we want to plug the holes in our economy and keep at replacement level (for all the good it'll do us) and not being able to afford families, homes, or anything beyond basic subsistence.
I fear a large group of their current voter base will not be convinced by any measure taken by any government that isn't the one THEY voted for. And they won't vote for anything except extreme anymore. Used to be primarily boomers, but I see it in plenty Gen X and Millennials as well already in my close and expanded social/work circles.