While I know that long rests will be a thing, I firmly believe that they should also include a short rest mechanic. For those that don't know, in 5e D&D many class features recharge on a short rest (1 hour). Also during a short rest players may expend hit dice to heal themselves. Warlocks for example have VERY FEW spell slots, but to make up for it, they regain ALL warlock spell slots on a short rest (while most other classes regain expended spell slots on a long rest (8 hour)).
Including only a Long Rest option (8 hour rest), will I feel take away from the 5e experience, as it would likely result in what is commonly referred to as the 5 minute adventuring day.
Alternatively, simpler albeit less desirable, you could make short rest abilities (such as a Warlock's spell slots) have a cool down or automatically recover that starts when combat ends (similar to Pillars of Eternity).
