Quote from: fearsomepirate;1017847I think the reason for the rule they realized most of the unintentional failures of 3.x design came from unforeseen interactions. The 5e rules are written with lots of safeguards to minimize the way things can interact.

I definitely think it has worked so far, I have seen spellcasters up to 18th level now and no issues on challenging the party; battles rarely feel trivial or grindy. Some splatbook stuff seems superior to PHB material (eg Bladesinger) but never in a game-breaking way. The issues I had with balance were solved by going over to 1 week long rests, this encourages PCs to face the intended number of fights per LR (6-8 per book, probably still 3-8 in practice) rather than have a 10 minute adventuring day.

I have my PHB notated with what spells are bonus or reaction spells and this is what came up with so far.

Bard 1
Cleric & Druid 3
Paladin 11
Ranger 6
Sorcerer 2
Warlock & Wizard 3

And aside from the Warlock only the Paladin and Ranger get any substantial combat bonus action spells. So yeah, Its not going to likely unbalance things unless you have like a whole party of Rangers and Paladins. and even then theres limited spells to combo with.