As a tobacconist in 1980s when Dunhill was making Nightcap, I would not have recommended it to a new pipe smoker. In fact I rarely recommended any English blend to a new smoker unless they thought it smelled particularly good in the jar. I found most new smokers likes something mild and at least a little bit sweet. Perhaps a Cavendish or a Burly blend.
I was never a big fan of English blends although there were a few that I could tolerate, Nightcap was not one them.
I started working in smoke shops in about 1980 and left that line of work in 1992. Shortly after I started working in a smoke shop I discovered Virginia flake tobaccos and that's what I've smoked pretty consistently since then until I quit smoking around 2000. Recently I've started smoking again and I went back to Capstan Blue but have begin trying some other blends. C&D Bayou Morning Flake I find quite enjoyable, so I ordered some in bulk. The bulk version is rubbed out and much milder to my taste than the tinned Flake. Strangely enough, I think I like it even better than the tinned version.
I recently got some C&D Three Brothers because I had been a fan of the old Three Nuns when it was still made in Scotland. I found the Three Brothers to be very different than Three Nuns, but I found it a very nice light smoke. I was impressed by all three of C&D's tobaccos I have tried so far because they burn well, they burn clean, they don't have a tendency to overheat the pipe, don't need to be frequently relighted, they don't have a great deal with moisture in them and I'm left with a nice clean white ash at the bottom of the bowl.
I am sorry your experience with Nightcap was less than expected. I am not familiar with the English Blends currently on the market, but I'm sure someone could suggest a nice lighter English blend, perhaps by C&D. I might even be interested in trying something like that myself, something not sweet, but with a little Latakia and perhaps Perique for some spice and flavor.
I found after not smoking for 20 years that that my taste has changed a little bit, though I still enjoy a medium to full Virginia flake tobacco.