[RPG] What was the status of Half-Orcs as playable characters in 2e

Yes, the Savage Attacks ability will work while Wild Shaped. Wild Shape allows you to use your racial features:

You retain the benefit of any features from your class, race, or other source and can use them if your new form is physically capable of doing so.

Savage Attacks kicks in when you get a critical hit with a melee weapon attack:

Savage Attacks. When you score a critical hit with a melee weapon attack, you can roll one of the weapon's damage dice one additional time and add it to the extra damage of the critical hit.

Every beast type creature that I can think of has at least one attack that is a melee weapon attack. For example, the Wolf:

Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 7 (2d4 + 2) piercing damage. If the target is a creature, it must succeed on a DC 11 Strength saving throw or be knocked prone.

So if you get a critical hit while Wild Shaped into a Wolf, it will deal 5d4 instead of 4d4.

There is very little information on this. For dwarves it goes like this:

"We hate orcs!" - "What about half orcs?"

"They are... Half as bad!"

From pathfinder wiki:

Half-orcs are generally considered little better than their full-blooded orc relatives and regarded with suspicion.

From Inner Sea Races (page 72), regarding dwarves, we got:

Dwarves and half-orcs rarely get along, due to the millenia of violence between dwarves and orcs. Many dwarves have difficult seeing anything other than their ancient enemy in half-orc's burly frame, sharp tusks, and green skin.

And again (page 104), regarding half-orcs:

Other humanoids, specially elves and dwarves, have too much hate for half-orcs's orc heritage to even bother remembering the human portions, and react with anything from distain to naked violence.

Also, check the wiki for more info on half-orcs on society. Most of that information was published on the Bastards of Golarion player companion, but the book has stuff not posted on the wiki, like information on half-orc heritages (half-orcs from darklands, half-orcs from the desert or jungle, etc).