Personally, I find it the most tolerable merging, but others might disagree. Even with a merged STR+CON stat giving bonus hp, it’s still not eclipsing DEX. It would be eclipsing the other abilities though.
Sounds sensible
I’d go back to fortitude/reflexes/will, and add perception. It’s been 15 years since 3e has been shelved and I still catch myself calling for a fort save or a will save once in a while.
The 3e saving throws, Fortitude, Reflex, Will, plus Perception, could actually be the abilities, and it would work excellently.
Again, personally, I always preferred perception to be a save-like mechanism, leaving investigation be the active noticing skill.
One benefit of treating Perception as saving throw is it solves the problem of whether someone decides to 'investigate' an illusion. If they made their save, then by definition, they will investigate it because they did notice something was off.
Plus when dealing with 'hidden' creatures and objects, it seems awkward that the 'Passive Perception' would either always or never notice it. The save allows for chance, even if not actively searching.
(If the DM really needs to avoid alerting the players by rolling dice for 'no reason', then the DM can create a list of prerolled d20 numbers, and scratch them off as they get used up.)
I don’t disagree here…
… but I disagree there. Still, in the spirit of participating constructively, smashing the three mental stats and rebuilding them as two is a good way forward. Basically have a mental strength and a mental dexterity. Not sure if “Intelligence” fits best as a name for the mental agility but that’s neither here nor there.
Point taken about traditionalism. Any updates to D&D must be things that most D&D players either love or can live with. They need to be planned out ahead of time, so players can understand the updates and approve them.
However, D&D had traditionally two types of casters but now has three (for each INT, WIS, and CHA). You’ll have to decide what to do with Clerics and Druids (and rangers). They’d feel better in CHA (except perhaps for rangers) but that would exacerbate even more the lack of INT casters.
For the casters, Druids are Perception. Clerics (spiritual leaders!) are definitely Charisma.
As a thought experiment, mages applying the eight:
Artificer: Intelligence, Dexterity (irregular use of precision)
Barbarian: Wisdom, Charisma
Bard: Charisma, ... Intelligence (Lore), Athletics (Dance), Perception (musician)
Cleric: Charisma, Wisdom
Druid: Perception (attentive to nature), Wisdom (altered consciousness)
Fighter: −
Monk: Wisdom, Perception
Paladin: Wisdom, Charisma (more brave than flashy)
Psion: Charisma (innate magic, telepathy), Intelligence (intuitive knowledge)
Ranger: Perception, Intelligence
Rogue: −
Sorcerer: Charisma (innate magic, self-expression), Constitution (irregular use of body)
Warlock: Intelligence, Charisma (people skills and in this case relationship-with-entities skills)
Wizard: Intelligence, Perception
Note, I like how 4e gave each class a primary ability, then each of the subclasses a different secondary ability.