How about this for a feat to deal with some splash damage?
General
You get used to dodging the collateral damage of most things. When you are subject to splash damage, you may make a Reflex saving throw to negate the damage. The DC is equal to the original effect or if no save is available, it is equal to the class saving throw of the person causing the effect or 10 + the CR of the creature or item level.
Thoughts?
I want to make a danger close alchemist!
Alchemist
You know where to stand when the bombing starts. You do not take splash damage from item you create and use.
Thoughts?
How about a quick idea for DnD 5e?
Light Armor Master
Prerequisite: Proficiency with light armor
You learn how to better move in flexible armor. You gain the following benefits:
Thoughts?
How about some ideas for PF? Let’s get a homing spell into the mix!
Metamagic Wizard
Frequency once per day
You’ve learned to curve magic to make it do your bidding. If you cast a wizard cantrip or a wizard spell that is at least 1 levels lower than the highest-level wizard spell that requires a spell attack, only targets a single creature, and you miss the target, you may spend an action to reroll the attack.
Thoughts?
Ok, one more version of this feat for DnD this time!
You spend extra time charging up your strike. Gain the following benefits:
Thoughts?
Now let’s move this idea for 5e!
Just get in and get it done! Gain the following benefits:
Thoughts?
I hate leaving actions on the table, so I think interrupts need more play.
General
Trigger A creature starts it turn or moves within range of a melee atrack
You quickly strike at the target. Make a melee Strike against the triggering creature with any multiple attack penalty you currently have.
Thoughts?
Ah persistent damage! My new favorite toy to drop PCs. Let’s help them survive!
General
You just keep finding ways to get out of trouble. Gain a +2 bonus to your flat checks to end persistent damage.
Thoughts?
I don’t see the feat to gain a bonus to saving throws in DnD 5e. I want those back, but is this too far?
Survivor
You are just made to not die. Gain a +1 bonus to all saving throws.
Thoughts?
Thinking about bonuses to things lately. What do people think about this.
You were just made to not die.
Benefit(s): Three times per day after your roll a save but before you know the results, you may add +3 to the roll.
Thoughts?
Throat Punch Games 