Well I'm glad you admit you don't know the case inside out - because your statement proves that conclusively, so let me help you my friend.
During that 2014 NZ series the WICB sent out a press release saying regarding the IPL clash situation with Narine:
“Narine had indicated by the May 24 deadline that he will join the squad on June 1 as required,” stated a WICB release, on May 28. “Narine subsequently advised the WICB on May 28 that he would not be able to meet the June 1 requirement.
“Narine’s decision not to join the camp by June 1 will result in him not being considered for selection to the West Indies squad for the Tests Series v New Zealand (June 8 to 30).”
But the New Zealand cricket board, whose own captain Brendon McCullum was a late returnee from the IPL, expressed a different view about making concessions for the India-based players.
This is what NZ coach Mike Hesson said at the time -
How to deal with pitches like plasticine
“Having players join the group at different times is something we’ve become accustomed to with the different formats of the game these days,”. “For those coming from the IPL, it’s not like they’ve been on holiday. They’ve been immersed in cricket for a long time so the transition won’t be as difficult.”
In New Zealand’s first warm-up game in Jamaica, the Kiwis used an unknown Jamaican player, Myron Wilson, to complete their XI, due to the late arrival of several star players from the IPL. There is no evidence that this created an uproar in New Zealand.
Myron Wilson | West Indies Cricket | Cricket Players and Officials | ESPN Cricinfo
Tour Match: Jamaica Select XI v New Zealanders at Florence Hall, May 29-30, 2014 | Cricket Scorecard | ESPN Cricinfo
NZ repeated this same sane approach this year ahead their England tour regarding their star players.
I see you quoted Richard Pybus - but if you read his 19 point plan to revamp Caribbean cricket, points to the establishment of a window for IPL players in point 14; but, in point 7, says priority must be given to West Indies selection.
http://windiescricket.com/sites/default/files/West_Indies_Cricket_Systems_Report_2014_-_Prepared_By_Richard_Pybus.pdf
How could an IPL window not include the final of that competition?
So essentially WICB made a mountain out of a molehill when they could have easily let Narine play the final and then come after to play the test series, NZCB acted with sense and we know who won that series in the end.