Those F16s are no longer relevant at this point as a high ranking Ukrainian official pointed out recently. Fancy stuff coming late won't help much.
We shall see about that. Right now it seems that there is a big push for getting a large number of high quality air defence systems for Ukraine, to coincide with the arrival of F16s.
If the F16s come together with air defence and many missiles, they could turn the tide of war. If Ukraine manages to dominate the air war and stop Russia from using gliding bombs while also hitting them behind the frontline, the situation may change dramatically.
Remember that this war has had various stages, some in which Russia was dominating and gaining ground, and others when Ukraine had the initiative. Right now the Russians are having the initiative and they are pushing on many fronts, but their advances are so far very slow, akin to the failed Ukrainian counteroffensive of last year. If they don’t manage to make serious gains before the arrival of F16s, they may not be able to do so afterwards.
While Russia has already ramped up its military industry, the same process is also happening in the West, but at a slower pace. This means that Russia had a bigger boost for now from this, but over time the ramping up of the Western MIC will outpace any increase Russia may have from now on.
Russia may experience its strongest moments in this war right now, and if they don’t manage to capitalize on this period of Ukrainian weakness, they may not have a second chance.
Long term, I think the odds are still in Ukraine’s favor, as the US and Europe can afford the costs of this war for a much longer period of time than Russia.
will send an additional SAMP/T air defense battery to Ukraine. SAMP/T is considered a tier 1 one air defense system along with Patriot. 
will send an additional 6 TRML-4D air defense radars to Ukraine. The units work in conjunction with IRIS-T SLM / SLS air defense systems, or as standalone units that can be integrated into the overall air defense picture. They have range up to 250km and can track up to 1500 targets simultaneously.
is working closely with NATO Allies to front Ukraine $50 Billion usd in direct aid that they can then use however they see fit. The partners in the initiative would then have their fronted funds paid back using the more than $5 Billion usd in annual windfall profits generated from the 300+ Billion usd in frozen Russian assets that exist in Western banks and financial institutions.
, Poland 
and Bulgaria 
who have lots to sell to a country flush with cash and willing to pay the price.
