Yeah we have 24 interpretations of elves and dwarves. Your logic is like "They made them evil so they are evil" ORCs are not created by Tolkien
Uhm, I'm pretty sure orcs were created by Tolkien (unlike, say, elves and dwarves that he just put his own spin on).
Anyway, that isn't my logic at all. What I'm saying is that when you say "orc", everyone is going to have some basic expectations associated with the term. Not necessarily the exact same expectations, but the word carries a lot of baggage. There's a really tiring trope plaguing most current fantasy settings of being oh-so-different and look-how-we-subvert-classic-fantasy-tropes (note the irony). My "logic", as you call it, is that the further you deviate from the 'classic' orc, the less people will instinctively know what the heck you are talking about, and the more you have to explain everything.
Eventually you get to the point where you might just have called your race something else to avoid the initial confusion.
I guess I have to make this point clear though: This is not an on/off switch. I'm not saying you have to recreate Tolkien-esque orcs down to the last wart or you should call them something else. In fact, I'm not even convinced that Tolkien's orc is necessarily the 'default assumption', anyway. But at some point it just gets silly. Especially if you've not been good enough to communicate this to your own writing staff, so that some stories will involve orcs being classic orcs, and some will have orcs being the pink fluffy sheep that they are in your setting (or whatever).
As much as some people go "bah, Darkspawn are just orcs", that's exactly the point. They are the DA:O setting's equivalence of orcs, but they aren't particular orcish. If they had been called orcs, the differences would have caused more confusion than benefit. There's no reason for them to be orcs, unless they are actually, you know, orcs.
In short: The advantage of having an orc race in your setting, is that people will have a general idea of what they are about, so you save some explaining. All you have to do is focus on how orcs fit into your setting, and perhaps how your orcs deviate from the norm (for instances, orcs don't absolutely have to be chaotic evil. Maybe they have been somewhat 'civilized' in this time frame). The disadvantage of having orcs in your setting, is that if you really imagined something completely different, not only will you have to detail everything about this race, you also have some default assumptions actively working against you. That headache is entirely unnecessary.