So maybe your friend could buy a train ticket for you at the ticket window at the station earlier?
There are machines now at the station and no queues for them at that time of day - should be quick.
(Warszawa Śródmieście /Warsaw Downtown/ is almost the same station as Warszawa Centralna, they are connected via an underground tunnel)
Confusing for a stranger to Warsaw, and annoying for someone with luggage. There are 2 flights of stairs, then a long platform, then up a moving ramp that is not switched on. Then you're only actually in the Galeria Wschodniowa. It's actually quite a walk.
the bus is even better in that the bus stop is much closer to the exit from the terminal than the train station
Yes - in fact (much as I hate them) the airport bus is almost always better, except in the rush hour when ul. Zi W gets jammed or if you're going to Zachodnia,
Maybe you could rearrange the meeting with your friend so that he would wait for you at Warszawa Zachodnia? It's smaller, so it would be easier to find each other, and it is very simple to get from Warszawa Centralna to Warszawa Zachodnia.
A good idea, however it isn't that small so they'd have to agree to meet on a particular platform.
It depends on from where are you coming, but if from Schengen area, then there is no passport control, so it's faster.
LTN - WAW so it's the barrier and maybe the queue. A lot depends on what other flights have come in just before. This can cause problems. Not just the queues but also a longer wait for luggage. For a 1750 arrival it isn't too bad at all - no other non-Schengen just before, and a couple of Schengen flights in the previous few minutes. Businessy ones so probably not too much luggage.
If there's no flight delay and not too much mucking about with remote stands, he should have plenty of time to get the 175 bus and make it to the TLK Krakow train with 15 minutes to spare.
Let us know if you get to Krakow on time and OK.