D&D 5E Any reason not to let PCs add Proficiency to all Saves?

[S'mon]

If caster save DC is 8+Prof+stat bonus then target non-Prof saves will get harder and harder at higher levels, much like 3e. I'm not a fan of this. Is there any reason not to give Proficiency in saves across the
board?

 

[The Myopic Sniper]

I don't think it will break anything. The only thing you might need to do is find some alternate class and subclass features that give proficiency on saving throws. Off the top of my head, Rogue 15 (Slippery Mind) and Monk 14 (Diamond Soul) would need to be adjusted. I would just give the characters Advantage on those saving throws at those levels instead.

 

[redrick]

If caster save DC is 8+Prof+stat bonus then target non-Prof saves will get harder and harder at higher levels, much like 3e. I'm not a fan of this. Is there any reason not to give Proficiency in saves across the
board?

You'll probably find that your save DCs aren't high enough. 5th level save DC is gonna be around 14. Most characters will be at least +3 on their saves, just from proficiency, so your 10 Dex fighter will save 50% of the time.

Or something like that.

 

[neobolts]

If caster save DC is 8+Prof+stat bonus then target non-Prof saves will get harder and harder at higher levels, much like 3e. I'm not a fan of this. Is there any reason not to give Proficiency in saves across the
board?

It makes them harder to kill.

 

[nomotog]

Won't that kind of reduce the diversity of the classes if everyone has the same saves?

 

[Falling Icicle]

What if you gave characters half their proficiency bonus on their non-proficient saves instead?

 

[Diamabel]

If caster save DC is 8+Prof+stat bonus then target non-Prof saves will get harder and harder at higher levels, much like 3e. I'm not a fan of this. Is there any reason not to give Proficiency in saves across the
board?

Because it completely invalidates the Resilient(x) feat.

You'd basically be giving everyone the 14th level monk ability Diamond Soul.

Additionally, without any ability to target low saves, you'd substantially weaken any caster using Save vs. X spells.

 

[BryonD]

If caster save DC is 8+Prof+stat bonus then target non-Prof saves will get harder and harder at higher levels, much like 3e. I'm not a fan of this. Is there any reason not to give Proficiency in saves across the board?

In my opinion it is because hazardous magic is a thing to be avoided, not shrugged off.
Saves are cool for informing the narrative in ways that fit the nature of the characters (monks and rogues tend to be able to leap out of the way)

But I love that (barring a specific build) a fighter never gets better at avoiding fireballs.

I fully recognize this is a matter of taste. You asked for a reason not to change it, so I provided one.

There are other parts of 5E I think are terrible. I'm not even asking, I just changed them.

 

[MechaPilot]

What if you gave characters half their proficiency bonus on their non-proficient saves instead?

This is what I would go with. It preserves the concept that proficiency with a save makes you better at it, but it reduces the difference at the highest levels from six to three.

 

[Paraxis]

Because it completely invalidates the Resilient(x) feat.

You'd basically be giving everyone the 14th level monk ability Diamond Soul.

Additionally, without any ability to target low saves, you'd substantially weaken any caster using Save vs. X spells.

All of this.

Characters are supposed to have weaknesses, you will also notice most monsters don't have any proficiency bonus to any saves.