There is little logic to the way things happen in DUB. Whilst the rest of the world is pretty much standard-ICAO Dublin carries on business in its own little bubble.
Most of the issues you raise about taxiway nomenclature and layout and also where the Ethiopian 787 was directed to park can hardly be laid at the door of ATC. Those are all matters for the airport authority. Amongst the recommendations of a recent AAIU report into a ground collision between two 737s at Dublin was that:
"The Dublin Airport Authority (DAA) conduct a critical review of the taxiway system at Dublin Airport, to ensure that taxiway routes are as simple as possible in order to avoid pilot confusion and the need for complicated instructions."
The report also states that Dublin Airport accepts the recommendation and will undertake a critical review of the taxiway system to ensure that taxiway routes are as simple as possible.