well, CON is futureproof for sure since it’s the only stat that isn’t “broken” or “useless”.
I’d imagine that even if they remodel everything else, they most likely will not nerf the HP- or block rate increement via CON, since it’s currently not viable enough. Players run around dual wielding (= no block) and with no CON builds (similar to all those no SPR builds) and still manage Rank 8 content (lvl 280+ maps), which shows us that even investing in CON is currently not necessary.
Unless IMC really wants to grief players, it’s not very likely that they will nerf CON, which gives us a certain stand with points invested into CON.
It’s also likely to become more useful if they really nerf the flat defence reduction and/or if the damage vs. defence curve is continuously rising sharply as it’s currently.
Meanwhile, there’s also the issue of DEX being a trap.
While it’s currently the best way to increase overall damage via crits and accuracy, this could quickly change due to the fact that required accuracy and critrate could also rise sharply, especially if blocking were to be introduced as a damage mitigation option to more monsters.
This could lead to the point where you’d deal more damage with STR due to the fact that STR gives you a huge block penetration bonus.
INT is also questionable,since it’s currently not really good but there is also the issue of it being rather useless because later-Ranked skills don’t scale with INT.
SPR is just bad currently, nothing to talk about here because even IMCs statement on status improvement just mentioned a better scaling of Cleric skills via SPR, making it a useless stat for basically 70% of all Classes.