Euro 2020 Qualifying

We could get Wales again in the qualifying proper 

Only showing the 1st 4 pots as it stands. Based on that I'd be happy with Swiss as top seeds Austria as 2nd Seeds and Estonia as the 4th seeds

Can't find the potential  5th and 6th seeds as it stands anywhere 

So we're pretty much guaranteed a playoff because I reckon at least 12 of the above teams will qualify automatically

Well, it depends on where we ultimately finish in League B. If we are ranked 12th, there is a chance that maybe only 15 of the 23 teams above us qualify automatically, especially with some of those restrictions on the draw.

Now, that basically requires 5 of the League C and D teams finishing top two in their groups, which is kind of unlikely, but certainly possible. I can see a way, for example, for Serbia, Norway, Finland (12 points out of 12 in the Nations League), Israel and Montenegro could all finish top two in their groups, as third seeds. Certainly, there will be second seeds there for the taking by third seeds: Turkey, Austria, Iceland, Ukraine and Russia could all, conceivably, be second seeds but finish below those third seeds.

I appreciate it is unlikely that all five would happen but it is a possibility. Also, being in the playoffs is no guarantee of anything: imagine we were in playoffs away to Turkey first and then away to the winner of Iceland v Ukraine three days later. That is a perfectly possible playoff scenario but there is no way we would get through it.

Could playoffs not be held on neutral grounds?

Say League A- Germany- Semi finals in Gelsenkirchen and Dortmund final in Berlin

League B- Say in Sweden -Semi finals in Stockholm( Tele2 Arena) and Malmo Final in Friends Arena

League C Scotland Semi finals in Ibrox and Parkhead Final in Hampden

League D- Say in Azerbaijan or Georgia say

that would avoid unnecessary travel for fans

It'll be a home game for one of the finalists. Draw is done at same time as semifinal draw so they'll just have two balls in draw for final called "winner of Match A" and "winner of Match B" or something. You're right about the higher ranked teams in the semis getting home advantage.

Just looking at the current Nations League rankings and as it stands Ukraine would be at home to Russia in one of the League B playoffs. Wonder what they'd do in that scenario seeing as there's an agreement in place to separate the two in any qualifying draw.
 

I'd imagine it would be somewhere like Zurich 

We will be pot 3. There are still a few other changes with other teams.