Personally I think suspension tuning should always start with the anti-roll bars. Most of the complaints people have with the LCR's handling is excessive roll, this is best sorted with some stiffer arbs as it won't compromise comfort as much as swapping to coilovers.
I've no idea why people ditch the standard suspension tbh, the dampers especially, they're nicely tuned and pretty quick. Very adjustable on the limit, nothing wrong with them atall. Just stiffen up the roll resistance with some arbs. People assume because it rolls a bit, it doesn't handle that well. While roll may be pretty disconcerting for the driver, it doesn't actually impact performance very much atall. Maybe throwing the geometry out a bit. Look at the track times the LCR has set in various magazine tests (Evo etc.) it's one of the quickest hot hatches around.
I get what your saying....but...
IMO standard suspension is just a bit too hard - a complaint levelled at most Seats....Changing to coilovers need not sacrafice comfort - that depends on the type you go for & how much you are willing to pay.
I can honestly say that the H&R's have actually improved comfort - the car doesn't have that
every time you hit a mild pothole or suffer an uneven surface. Road holding has also improved.
Excessive roll....in particular the tail end, is not attributable to the suspension - so the decision to change was not based on that.
The advantage of coilovers, for my purpose was adjustability for ride height - this could have been achieved by springs, however, then you have springs which are not set perfectly for the dampers - not too good for road handling. The coilovers have a perfectly matched spring ratio.
The excessive roll as mentioned above and as you alluded to comes down in most part to the ARBs - These will be the focus of my modifications in the very near future...