That's what I expect, which is what the last one (Jason patch) did; it was a few patches in one to bring the PC version to same general status as consoles.
For many, the last patch did a lot of good stability wise (slightly decreased performance for me) once they fixed the save game deletion issue. For me, I'm going to not patch right away and wait to see if others are having issues.
I've also heard WBIE is heavily involved with this patch, so hopefully things will go smoother. With two more DLC characters to come afterwards, there's a few more patches we'll likely get (PC) as well.
Ah, see, for the "netcode," I honestly don't expect that to improve. I mean, look at the past games: Mortal Kombat (2011) was horribly online at launch on the PlayStation 3 and Xbox 360, and a patch NRS released later improved it to sub-horrible.
NRS did the Vita version, and it's online was better than the console's, but still not great. HVS did the PC version, and it's online was as bad as the first party console versions.
I didn't play Injustice: Gods Among Us, but I heard it was only slightly improved.
So knowing this, and knowing that NRS fighters consistantly have poor online regardless if it's developed by NRS or ported by HVS, I simply assumed the Mortal Kombat X's online would also be horrible and that it'll always be bad.
If they're able to improve it, I'll be pleasantly surprised, but I've been expecting since pre-launch for it to be bad.