Yes, that is worth noting. Not sure if it is within the FDA's remit, probably have to be an amendment to an act, authorised by Congress, if nicotine were to be reclassified as a controlled drug?
It may be more likely that they are trying to increase the pressure, by starting a movement to class nicotine as too dangerous to be freely available in consumer products without FDA regulation of quantities/strengths. That, I think, is an achievable goal as it may well be within the FDA's remit to control nicotine strength.
This is the sort of regulation that the FDA will want to apply eventually, in order to strangle e-cigs 'legitimately', and if they have the backing of some medics then it would be easier to table such regulations. We know that this is the sort of thing they will eventually get around to working on, in order to reduce the attractiveness of e-cigarettes to buyers. They will obviously want to attack flavors, the availability of refill liquids, nic strength, possibly even power output. Anything that makes e-cigs work and that makes them more attractive to users than pills, patches and gum. When these regs are tabled the fight will start all over again.
So this may represent the first move in the pharma / FDA presentation of new regulations for e-cigarettes. First create the appearance of support for regulations, then present the regulations. Long way to go yet though.