If you are only wanting to do this because you don't think your original wrapper is as carefully designed as the rest of your project -- AND you will only be changing the internals and not the API -- then no, i don't see very much value in changing it.

Aside from that, i also see very little value in writing a wrapper or subclassing DBI in the first place.* There are helper modules out there to handle config data, and i have never needed to retry connecting to the database myself. YMMV of course, but i like DBI straight out of the box.

* update: renodino explains this point better than i did. renodino++

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)