Brigita,
How did you hack the water level in your LG? Did you do it, or did a service person do it? That info may be helpful to those members here with LG washers.
Re: Scents
IMHO, clean means no lingering aroma. If I have a choice, I'll buy a detergent, liquid or powder, without any added scent. I have noticed that even with scented detergent, most if not all of it goes away after machine drying. Then again, I have a male nose, a women might be better able to detect lingering scents.
Re: Water levels
With regard to water level, when I ran the bath sheet test in the Miele W1918 last week, I selected the "Extra Water" option, but the water still didn't come up to the bottom of the door during the wash part of the cycle. However it came up about 1/3 of the way up the glass during the rinse cycle. It may be that I was fiddling with the controls during that wash that that defeated the Extra Water option; I'll have to repeat it the next time I get a load of bath sheets. Or of whites, which the Miele does exceptionally well.
The Neptune 7500 does not, as far as I know, have any way to increase the water level, outside of physically fiddling with the water level sensing apparatus mechanism. And I don't know if that is possible, either. The machine diagnostics screen show two basic water levels: Low, for the wash cycle, and High, for the rinse cycle. On the plus side, the washer never leaks. Unless there's severe over sudsing, and then it only leaks when the door is opened.
That brings up one feature of the Neptune that I like. Outside of a spin, the door can be opened at any time, to check on suds level, add a garment, add detergent, etc. Miele makes that more difficult, requiring pulling the emergency door release cord in the little trap door at the front of the machine, and then you're best advised not to do that during a rinse cycle when the water is above the level of the glass.