I mean, there are pros and cons two this suggestion, but I'm feeling like its a bad one.
It would be handy to have both ecos merged so that there is equal spending money for all three worlds, but yet again if you do /server on MeepCraft, you'll only be able to find around 7 people combined on towny A & B.
The real fix to this issue would be to have a plugin so that you can easily convert the old meebles (I think its legacy money) into new meebles. That would be much easier than merging ecos.
In other words (or in this case, numbers), -1
Yours, (and I hope you weren't offended),
~Kat