Can anyone give a definitive answer whether using the spam feature in the wallet is good for the network? I'd love if it's eli5'ed in a couple of sentences lengthier than Yes or No

We are deploying a fix that will make it easier for exchanges to process transfers, your issue will be solved semi-automatically after the fix is adopted by the spammers.
Is the fix included in the 1.1.2.6?
The network spammer is good for the overall network as it provides PoW for transactions to be pushed through.
From my understanding, for every transaction that you send, PoW are required for 2 others, so it helps confirm more transactions