Hi Jomo,
thanks for answers!
As an alternative to your approach variant you can also ask the pilot to use a transition as they do in real life at EDDF.
At EDDF we use SID/STARS as seen on the Radar/Screen-films - and it did cost me a lot of time to put them onto the screen - in order to be able to supervise traffic! And even for these (more easy) procedures there are only very few (1% ?) pilots using them. To add other procedures to it (which most pilots will not even know what that is) would be a lot of more burden for the single ATC. But I would appreciate if more pilots would use the STAR/SIDs.
Ok.
As far as i remember you ask unknown pilots if they are able to use VOR/ILS. May just "extend" it and ask them if they want to have a STAR asigned when on approach.
as far as i know the procedures in EDDF in real life are a bit different, for ex they use 25c/07c also for approaches and the usage of taxiways is different.
That is correct. I changed that to help beginners: i.e. nobody gets delayed if a beginner needs 10 sec or 10 min to get ready to start. And it is easy to remember "use tw L for incoming - N for outgoing". To force every plane to a unique parking-position requires a lot more ATC work - i.e. would need a GND-ATC for a 4h job for each session if he may sit there for many hours without work! I tried that several times - but none ever tried it a second time! So again: That is done to ease this so (even new-bee) pilots can do that themselves! It really always became very confusing if a GND-ctrl is assigned but not available when needed! That happened every time I tried - so I do not accept GND or other support-ATCs any more!
Ok, thats understandable.
switch virtually between positions(delivery,ground,approach/depart, center)
I am not sure how that should work: Using 5 different FGFS-IDs (as well on typing as on mumble!) instead of the one we use today? No - I would not like that additional burden for a single ATC! That may be ok if only 1 plane arrives - but sometimes there are 5 same time - I am afraid that would lead to a lot confusion (and my brain may explode!). e.g. how would you know/remember with what ID you were just talking to what pilot - and reverse.
Dont use different IDs. At the end its just adding the sentences. EGKK_JON for example does it. He use only one ID, but tells you to contact ground/departure/center and so on on same mumble Channel or text chat.
why not also assigning an approaching plane a gate or stand after vacating the runway and give taxi instructions?
We tried that - but most pilots do not know were that stand is or do not like it! And ATC must know all Airplane sizes and company area etc. (Gate, Lot, e.t.c) or pilots would just like to discuss why this and not that. Again: I am afraid that would be nice if you have may ATCs that have learned to work in a team. And be aware: How to remember which Pilot has a unique parkinglot (like e.g.LH-1701).
Did i ever pay my parking-lot

?
In case a pilot dont know where a stand is, he/she should ask for progressive taxi.
I wouldnt make it complicated.
For ex. nearly every airplane fits at the Lufthansa Stands at T1. So just use this terminal and the cargo area for cargo planes like i fly.
reguards,
tobias