I still run white, and maintain it's the best splash for goblins.
The reasons:
- StP is still the best spot removal in the format.
- Green gives no tools against combo which is just inexcusable.
- I've tried Blue and I just don't see it. It only slightly improves your combo match up while turning your clock and consistency to dog shit.
- Black is firmly mediocre in my books. EP resistance is okay as is discard, but I've seen combo decks repeatedly go off through first turn Duress with ease. Unless you're again willing to sacrifice your clock you won't have enough discard to rely on.
- In addition to StP white also gets what is IMO the best anti-combo card in the format - Orim's Chant.
My sideboard looks something like this:
4x Orim's Chant
3x Pyrokinesis
3x Meekstone
2x Abeyance
1x Swords to Plowshares (3 main)
2x Disenchant (2 main)/Echoing Calm/Serenity depending on the metagame.
In my opinion Meekstone is an absolute necessity, and not running it is strictly a mistake. It costs ONE mana and hoses all the creatures you're worried about but leaves your own untouched! The only downside I've seen is when it gets countered and makes Goyf bigger.
The 2 Abeyances were put in because when I was building my sideboard I ran out of cards to put in and commented "what I'd really like is 8 Chants." Well, Abeyance is the next best thing.