Hi Karol.
That statement is correct in the sense that it requires a good scan, and that is one one of the reasons I like your instrument, it forces you to improve your scan, when used in the high precision mode.
The reality is, in real life flying, the ILS approaches are easier to perform than many / most non precision. After you intercept the GS you have less work to do, no fixes, step downs, heading adjustments... just follow the bars.
I use the simulators, and have been using them in a different form since 1976, to refresh the procedure sequences for the time I may not be flying sufficient, for me is at least 2x/ wk.
I also recommend to the pilots I fly with, in particular the the IFR rated, to do the same.
That said, it's important that the location, size, spacing of the instruments be in the proper sequence and replicate a real world acft. in order to maintain a proper scan. Fortunately I have some acft. that I created, like the 182RG that allow me to do that on a 42 in. screen. There are also some other acft. that exist where you can set set things up to accomplish close to the same result.
Thanks again for your effort and I hope some day you may want to add the Timer and Ground Speed to the ILS bars window. That would make it one window, complete, precision approach gauge.