Yes, I think the EVO 80 will bring noticably more control to the 4.2 sailing than the Kombat 89. It just a more control oriented board, thinner, some concaves, more rocker, softer rails etc. If you like how the EVO 75 turns but just thinks its to small, the 80 will probably serve you well.
Another option is an Acid/Kode 80 which is aboard that is closer to the Kombat 89 in general feel (similar rocker and rails) but a fair bit narrower and with a much narrower tail. That would be a great high winder for you for sure. It is not an as easy turner as the E80 in slow waves but either more blasting or if you often have side shore and good waves, the Acid/Kode 80 is a real gem.