Hey, if you want to. If you decide against it, later, well.. honestly, your Alch skill isn't that high and would be easy to get back quickly.
An alt of mine, a 17 Mage, has ~140 Engineering. The bombs he makes are neat- no question about it- but not overly practical in PvE just yet. I was wanting to hit 18 with him before going into BG (considering most of the BG players in this range, on my server, are highly twinked lvl 19's. Bastards.). Now, I'm in college, and haven't played him in about a month, so don't quote me on this.. but I do believe that using bombs has a timer on it, but you can toss them while moving? So far, my best stun is 3sec (I think?), and the AoE isn't something I would rely on against a moving target, especially considering the fact there's a travel time on the projectile itself.
I believe having the bombs in BG would be an advantage.. I'm just not sure how much of one. The stun might be neat vs. casters using non-instant spells, such as a Mage who might sit there and try pelting you with a bunch of spells, and especially vs. tightly packed groups.