GO finishing is still not quite up to Lange standards yet.
However this excellent picture of the GO Panomatic Lunar cal GUB 90 might give an idea of how a decorated 3/4 plate will look like vs a decorated say Unitas 6497 or ETA 2824/2836/2892 (maybe someone can post up 1 as I do not have any)
borrowed internet pictures...
I have 3 watches with the 3/4 plate.. 2 GOs and a Damasko DK-10.
will try to take and post a close up of the GUB 100 & A35-1 calibers later
To share my experience, yes I notice that both my GO 3/4 plate movts does oxidise and take on a slightly yellowish look. One is tempted to use a more artistic and positive word, patina.
The A35-1 is plated so will not oxidise.
Taste is very personal and to me, I think the decorated German 3/4 plate looks much more elegant and classy than its equivalent run of the mill perlaged, geneva striped, chemically blue screwed Swiss ETAs/Soprods/Sellitas.
Whilst I agree that some of the 3/4 plate cal designs do not expose most of the gear train, showing only the balance wheel & cock which is a bit disappointing, depending on the complication and design however, there are other 3/4 plate movts which also reveal their gear trains as well as much as the Swiss stacked bridge designs.
Apart from some of these automatic 3/4 plate designs which do not show much of their gear trains, those manual wind GO/Lange high complications e.g. tourbillons, chain & fusee, chronographs, perpetuals, etc are a different story on top of being very intricately decorated and lovely to look at even when compared to their Swiss counterparts..