I don't know about others, but having finished the 33-week course as a subbie, I can appreciate the skill sets that were given to me in learning the other language of my country. Don't get caught up in the policies and politics; use it as a tool it is. My buddy (ex-CF) is an NCO in the US Special Forces and, just as young officers in the CF, he was pulled out of his tactical training to go to language training. Yes, it was part of his Q-Course to learn a South-East Asian language that he may never use operationally (especially when you consider that all the work right now is in the Sandbox). However, the tool is there, like it is for those who go on SLT. Now, having picked up some new approaches to learning, I've begun to learn some other languages as well.
Consider this - English is pretty much the international language right now, while French is spoken in the Carribean, much of Africa and throughout parts of South-East Asia as well. Having both these languages is a useful skill indeed. Considering that in today's conflicts dealing with locals is probably the key to winning, I would argue that language skills are just as important as tactics for young leaders who may, as junior leaders, one day find utility in their ability to communicate with others.
The only problem I have with SLT is the way the course is structured. 33-weeks is too long; maybe they could break it up and have you do training in between (like leadership training, maybe even a bit in your other language?). by the 7th month, the Don't-Give-A-Fuck factor was pretty high. As well, the SLT learning environment is quite civilianized, and the notion of being in the military pretty much goes out the door (8 months and I never once did drill). Some of the guys, coming right from CFLRS, are just cut loose with no real idea on how to conduct themselves as CF members. The fitness level slides for many. Some of the civilian instructors, quite honestly, have no idea of the system they are in which can cause some problems from time to time. SLT would probably have been more enjoyable had it been on a real military base, included some military activities from time to time (morning PT maybe?) and had a break in between in order to get the students out of a small classroom environment.