PFL Omega is a very nice car. A bit under-rated perhaps (probalby as it played a role in a, at that time, dying class of non-premium executive cars).
I wanted to approach this part of your post separately as it's a very interesting topic and distinct from the making it look better subject.
The Omega B in general was very overlooked and today it is very underrated. It offers so much more than many cars costing more. Looks is subjective, but you can't deny the bang for the buck. Compared to many of the other cars from it's time and even some newer ones it had good features that others didn't, even those which were more expensive. For example side airbags in the seats, instead of the much cheaper and less effective version mounted on the B pillar or doors which most cars had or have.
But it wouldn't matter how good the car was or where it was better than the competition. Or even how much more you had to pay to other manufacturers to get something much better or even which had the features the Omega did. Some people can't look past a badge.
As for the whole premium or non premium thing, don't you find it an amusing topic?

My mind changed a lot about that since I moved to Europe. Is an Audi really a premium car over an Omega? If you take away the badges, I can't really see it. The longer I live here the more I see Audis for what they really are. VWs. Is a Passat a premium car? Not to me and not here. I have driven C4 and C5 A6s. I can't say they feel or even look more premium than an Omega Elite or MV6. I know several people who have Audis here and to me they are nothing special. An A3 is basically a Golf!
Back in the UK and also in the U.S. people go bonkers over BMW, Mercedes and Audi. Here all of them are taxi cabs. Sure, they command some market presence. But nowhere as special. Every time I stop at a traffic lamp I'm surrounded by BMWs, Mercedes and Audis, as wheel as the other VW variations and French cars. And guess how many Omegas? None. I think I have seen only two Omegas around for the last several months. Many people don't even know what they are if you take away the badge and it's amusing to see what they guess it to be.

With the FL you get a lot more of "Is it an Opel?". But most people can't really point out it's an Omega. So it's actually more special here than the "premium" cars.
So what is really "premium"? Is it really a real thing or just a fabricated impression crated by higher prices and urban legend? Is a Mercedes A or B really more Premium than a Passat or top of the range Insignia just because it has a plastic Mercedes badge on it?
What makes a car "premium"?
Luxury? The basic A class is not really more luxurious or nice as some of the top saloons from other "lesser" name plates.
Reliability? Mercedes from the 2000's are truly dreadful at that. BMWs break all the time too. VW is way more reliable than both.
Looks? Entirely subjective.
Personally I think badge snobbery has a lot to do with it.
So what if the Omega is not considered "premium" by most of the people who don't understand about cars out there or by badge snobs because it's an Opel/Vauxhall? Does their bottom of the line "premium" badge car have heated seats? Electric seats with memory? Leather interior? Side airbags? Cooled glove box? Air conditioner vents to the back seats? Heated washer nozzles for the front windshield? Headlight washers? Is it RWD? Is it a 4 banger or something more special? How many BHP? Well you get my point.

I think this whole "premium" thing is smoke and mirrors. Mercedes, BMW and Audi make lesser cars too.