There's been a decent amount of talk about the BLS but face it, the car hasn't succeeded yet, to make any headway in it's target market. It's possible that it may do better here but, I'm not so sure. Cadillac realizes that they need to pursue a more "global" market if they are to attain the respect in the industry they are looking for but, with the kind of sales numbers they have in Europe, they have a LONG way to go. Their largest market by far, is still right here but their product line is not really organized IMO, and they are still convinced that "American luxury" is NOT their goal, so where does that leave them? Is it maybe time for GM to face facts, and give up pursuing the Global market with Cadillac, and refocus it as an "American Classic Luxury" car?
As for the current product line, I've thought for MANY years, the Deville should go. It's really just a value leader for them these days anyway. Has been for a long time. It's the car that gives them their sales volume. Not a GREAT car but it's a GOOD car, and sells well. Not sure it gets them much though. Could be falling into the same pit that the Fleetwood did. Volume leader but not much else. STS has been Cadillac's "tech" car for a long time. I remember the Seville always got the new technology before anything else in the line, so it is tough to move that mantle to another car. IMO, they simply have too many cars competing against each other. Just not enough separation between the cars. I'd probably dump the DTS, expand the STS into a car that would compete with the 7-series, leave the 5-series to the CTS, and bring out the BLS to work on the 3-series. Three levels, keep them distinct from each other with only minimal overlap via entry level versions priced round about the upper end of the lower model. Then, I'd dump the XLR and replace it with a VERY distinctive "American" coupe called Eldorado.
That's MY Cadillac lineup.