Slightly annoyed that paladins don't get access this spell. 

Quote from ArtificeMeal >>

Quote from frons79 >>

What do you think it would be its effect on an amputee?

 If you are looking for a spell that can restore limbs, regenerate, reincarnate, True Resurrection and clone could all do that at varying costs, but 90% of them require you to technically die and be brought back from the dead and cost like a bunch of gold (except regenerate, but there you need to have kept the arm around)

 You don't need to keep the arm around to have it regrow via regenerate

Quote from Cameron_A >>

Why can't a Paladin learn this spell? It's baffling.

 Paladins can't learn this spell for the same reason they can't learn any other spell - they prepare their spells.

Can Greater Restoration cure the effects from the Raise Dead spell?

How much would this heal of a contruct’s hp?

Quote from MonkeybearQueen >>

How much would this heal of a contruct’s hp?

 None. This spell doesn't restore hit points.

Quote from Yanaria >>

Can Greater Restoration cure the effects from the Raise Dead spell?

RAW and RAI no. Though the effects of Raise Dead function similarly to a reduction to ability scores, they are not themself a reduction to ability scores, and they are constructed deliberately to circumvent using this spell. As always, your DM is free to rule otherwise.

Quote from VAPypr >>

Personal opinion here - Greater Restoration should not remove petrification. Stone to Flesh is a 6th level spell. I spell that has multiple possible effects (GR) should be higher level than a spell that only gives a single effect (StF), especially if that single effect is one of the multiple effects

Stone to Flesh is not a spell in 5th edition. Flesh to Stone is, however, and the reason it is a higher level than this spell is because it is an offensive spell. Flesh to Stone can potentially remove a creature from a fight, which is very powerful depending on the target and the setup available to make them fail their saves. However, restoring a creature from being petrified is far less powerful on a short-term basis, which means its effects are less important to game balance. Additionally, this spell consumes material components, which contributes to its lower spell slot requirement.