In fact, I would like to see Springbank experiment with putting a nice rechar oak barrel into their batches of this size to help offset the overpowering sweetness of such fructose-laden cask wood from Oloroso or PX. In this case, the former.
My order of preference with Campbeltown releases is generally as follows: Springbank first, then older Longrows, then good Kilkerrans, then good Glen Scotias, Hazelburns, and finally the young Longrows (which I never buy). Longrow peated is too young for me. I would very much like to taste a 15 year cask strength Kilkerran with a one heavily "Ardbeg Alligator style" rechar cask thrown into the batch for an accent. That would be fabulous. Yes, I know they don't exist, but one can still dream. . . . I would also like to see Springbank experiment with younger and older casks and then divulge the proportion. I know that's illegal in Scotland but I think it's illegal for unethical reasons owing to the fact that the big distilleries don't want the competition or the public to become accustomed to knowing how good a batch of older casks can taste with one younger one (past the banana/tequila stage) thrown to add power to the batch. Say a bunch of 14 years with a 10 year or two. What heaven that would make. I think labeling proportions of old to young in a release would be a great thing and the public would quickly become used to it and prefer it. I use this technique in my personal vattings to great effect and have really wowed my friends with it.
I would one day hope to see a Longrow release around 14-15 years of age that is a mixture of some charred bourbon or sherry barrels and some bourbon barrels. I really miss releases of older cask strength Longrow. It needn't be up around 18. 14-15 yrs is a sweet spot for me. I do always buy the 18. I liked the 2017 very much. I'm getting tired of Springbank and Longrows aged in rum casks. Rum sometimes creates a "thin" acrid sweetness that is cloying.