Just the idea that something was "designed" implies something intelligent having designed it. If evolution is truly fully mechanical, with no intelligent creator behind it, then it cannot be referred to as designed.
What would you consider it then?
I'm probably a poor person to ask that question as I believe there was an intelligent creator behind it.
Anyway, for those having trouble grasping my point, here's the definition of the word "design" by the Free Online Dictionary:
de?sign (d-zn)
v. de?signed, de?sign?ing, de?signs
v.tr.
1.
a. To conceive or fashion in the mind; invent: design a good excuse for not attending the conference.
b. To formulate a plan for; devise: designed a marketing strategy for the new product.
2. To plan out in systematic, usually graphic form: design a building; design a computer program.
3. To create or contrive for a particular purpose or effect: a game designed to appeal to all ages.
4. To have as a goal or purpose; intend.
5. To create or execute in an artistic or highly skilled manner.
v.intr.
1. To make or execute plans.
2. To have a goal or purpose in mind.
3. To create designs.
Note how every instance includes built into the definition the notion of a subject with some kind of intent. Reflect on the fact that intent can't exist without intelligence.
I hear what you are saying, and understand your point about "appearance", but if you will consider this for a moment. Everyone has heard of sculptor and painter Michelangelo, and although you may not have seen any of his original works, or met him personally, or even seen him alive, or physically with your own eyes see him in action, - would you then still deny his existence? Does it diminish his work not knowing those other things? Do you need to have met him to believe he was the designer of his works? Do you think his works came into existence without him? Do you think it's an "appearance" of design and not really a design?
No. What's your point, exactly?