cross training: pros & cons

Part of the reason I decided to train for the London triathlon was to start doing a bit of cross-training for my workouts. Well, maybe just to start working out. Same difference. Anyhow, cross-training seemed like a good idea for fitness and weight loss. But overall, I'm not sure if it's the way forward for me. Like any good libra, I've decided to weigh up the pros and cons of multi-faceted training.

Pros:
-Enjoying a little bit of everything: it's great to have variety in my workouts
-Less wear and tear as you use different muscles
-When I feel like blowing off a run, that's okay! I can swim or cycle instead!
-When I feel like blowing off a run, that's okay! (I think this point needs to be stated again, as it's a biggie)
-I've enjoyed cycling, and I wouldn't have gotten into it at all if I didn't have the triathlon as an excuse

Cons:
-Limited weight loss: running is really what I need to be doing to lose pounds, and as good as swimming and cycling are, they just don't cut it
-I feel like I'm not able to focus on anything. By swimming once or twice a week, I feel like I'm just maintaining my fitness, rather than improving it. The same goes for running - I don't feel like I'm improving as I can't focus on it.
-Sometimes, I just want to do something different, like the cross trainer or the rower, but I feel like I'm spreading things too far anyway, and there is no benefit to it if it won't improve my triathlon training

Overall, this has been a really good experience, and it's pushed me to exercise 4-5 times a week. I'll have a better impression once I've completed it, but as things stand, I'm pretty sure I'll continue to try and do more triathlons. I'm really looking forward to doing a sprint event, too. But I have to admit, it will be good not having to stick to a precise schedule, and have a bit more freedom with my fitness.