What kind of changes should I commit for review?

Hi, I'm working on Wireshark development for my company. We're trying to keep it as close to the official release as possible. So, we're only adding commits from dev-release as needed to keep it 1.12-like. We're also submitting some changes that we deem useful upstream for review into official release. My question is, what kind of changes should be submitted review? As an example, should we keep our own dictionaries of Vendor Specific diameter AVP codes, or should we submit it to the official version instead?

Thanks up front!