First Warning does not means a threat always, it can also be interpreted as caution. So in this context it mean caution, so relax.
Now looking at what USA has done so far with regards to India/Pakistan will help us understand where we stand. For USA their interest is supreme and there is no friend or enemy here. Currently in last decade of so this what the relationship is like.
USA needs Pakistan for WOT, bases for forces, supply route etc, I have never came across USA and Pakistan relationship outside of war, maybe little bit of image building but always driven by WOT.
Pakistan looks at USA as supplier of weapons, means to earn dollars for military service provided. I feel if you look closely like India which provides IT services, Pakistan also provides military services. They are doing this willingly with intention getting something out of it.
USA looks India as a potential customer and maybe a counter to China.
India looks at USA to get critical weapons, technologies and business in IT and other fields.
Now what USA does to balance between India and Pakistan is this.
Promises Pakistan and keep them interested, but in the name of process laws etc delays money, weapons and use it as a tactics to pressurize Pakistan. It also does not have any intention of providing state of art weapons to Pakistan and is more comfortable giving slightly more advance weapon to India.
As per India it sees it as a customer mostly but it has to balance with Pakistan too.
So given what the situation is someday it gives something to Pakistan to make them happy, other day it will do the opposite, but IMO goal is clear.
Give Pakistan enough to keep them interested but not enough to make them powerful.
Neither India nor Pakistan are in position to dictate USA, both has some leverage India as a customer and Pakistan as military service provider.