You are right and I probably should have stated it explicitly. I thought it was obvious for anyone who has used the LTC. There are also a bunch of other adjustments you need to make to use the full MLTC, so many that I daresay close to 99% of players are unaware of all of them.
FWiiW I think the 3/2/1 (or 4.5/3(1.5) evaluation is much better than 4/3/2 (or 1/1.5/2) for suit contracts and is overall a better guide to hand value. It is nice that helene's analysis backs my assertion that shortages are overvalued, although I think it is fairly clear really; most analyses I have seen suggest that 5/3/1 is not too far off and the LTC equivalents are nearly double these values.
And some nice historical background from Marlowe. Perhaps surprisingly I know the HT evaluation method (which is a more direct child of the earlier methods) rather well, much better than the MLTC for example, since I learned bridge partially from a book by Culbertson. I used it for quite a while as a beginner. Also interestingly, I still think Culbertson's write-up of Playing Tricks is as good as anything else I have seen even though it was written around 3/4 of a century ago!