Would I be able to add any pool and coin I want into the 1bash if the algo is already supported?
Yes you can do that using very simple steps.
for eg;
ETH_WORKER="miner"
ETH_ADDRESS="kryptoMiner"
ETH_POOL="europe.ethash-hub.miningpoolhub.com:20535"
ETH_EXTENSION_ARGUMENTS=""
You can go with any pool you want to mine with.
You can also mine other coins which use same algo, above you can put ETC address and ETC pool and you can mine ETC with that.
Its just a template where you can use it how ever you want.