I just signed up for an account I ran across this thread, so I guess I'll weigh in.
Having spent time in both the Militia (Infantry) and the Comm Res (Sig Op), I have seen the best and worst of both organizations.
WRT Comms Spt provided by Comm Res units to Bde and Area Ex, for the most part the Comm Res Tps have stepped up to the plate, and done fine job providing CPs, Signallers, etc. I think part of the problem lies in a lack of experience coordinating the expected training outcomes of a combined exercise. It seems at time the "grownups" don't talk enough. I've had Signallers working with my platoon on Infantry exercises that loved being a Pl Sig, while others would rather be in a CP drinking coffee. The point I'm trying to make is the Bde HQ staff should be looking at what is required by all of the participating units WRT Training Outcomes and required Support, and do their best to accommodate them. Not everyone will be happy all the time but with time hopefully it will get better. We can't expect it work overnight.
In the area of soldier training I would have to agree with Sig_Des on this. The Comm Res running it's own recruit training school is ludicrous. There is no reason to fly troops to Shilo to do a Basic. There are resources at the Area Training Centres to accomplish the ends. The addition of the potential Instructors and Unit resources to the mix would certainly help with the equipment and personnel requirements. It just never made any sense to me flying troops out there when they could drive, in most cases, a few hours and be at an ATC. Also the ability to load Comm Res Tps on a Garrison run BMQ would certainly shorten the amount of time required to get them loaded on a QL3 and doing trades training. One thing the Comm Res can benefit from with this change is more experience working with the other trades on a more regular basis. No trade operates alone in the field. Once the working relationships get hammered out, BOTH sides can garner some positive results. IMHO there hasn't been enough of a priority set on providing the Militia the Sigs support it needs. As stated above, it was fairly low on the list of unit priorities. This will most likely change, and I think that's a good thing.
I totally agree with Radop that the Reg and Res signallers need to work more closely. One of the areas that is problematic is kit. I was in Kingston on my QL 5 last summer. When we were completing the NCCIS portion we had some NS kit issues. When the Techs showed up to assist (I should mention that they went above and beyond helping us resurrect some old kit ), they hadn't seen an LCT or QRT in years. Obviously the Reg Force is using newer kit, so trying to train to a more common standard WRT equipment is going to be a problem. Also as Radop stated there are good, adequate, and poor soldiers in both components, we are just a cross section of the society from whence we came. I think that time, money, equipment, familiarity and patience can help to bridge the some of gap, but cooperation in training is probably going to give us the most bang for the buck.
To sum up, I think the Comm Res "going away" is not necessarily a bad thing (other than the money), but the task of integrating the Sqns into the Bde framework should really be scrutinized and examined thouroughly. The last thing we need is a convoluted "New Approach". Let's look at the Reg Force Bde HQ Sigs Sqn model and not try to reinvent the wheel.
At the end of the day we all belong to the same team and have a common purpose, to "make talky-box work", and give the members of the chain the ability to pass info up and orders down.