The words "in my opinion", "I think", "I cant" and "For me it seems" are sorely lacking in your post.
The beauty of flat design is in many ways counter to the points you made. For example they can look warm, inviting and polished. Of course they look unfinished when done improperly, just like anything else.
Skeumoprhism as well can be done with very little CSS, lots of efficiency and in a modern way, and if done properly it does not have to be "stuck in the past". The part about that it does not leave room for new UI elements comes down to design. If designed properly the website should accomodate alterations in the same way ant other style might. "Old UI clashing with New UI" comes down to design again. No style can help a bad design.
Your points on what design should be centered around seems to be purely your own opinion. I like my buttons with sharp corners. I like strong gradients where appropriate, I like loud design elements as they help grab attention, and I very much like strong colors. There is nothing wrong with using pure white, as it is in many instances the appropriate thing to use for content, style and design. If the whites hurt your eyes, may I suggest you adjust your screen?
90% of what you said boils down to design. If a design starts out terrible, it will most often stay terrible. It does not matter if it is flat design or skeumorphism.
The beauty of flat design is in many ways counter to the points you made. For example they can look warm, inviting and polished. Of course they look unfinished when done improperly, just like anything else.
Skeumoprhism as well can be done with very little CSS, lots of efficiency and in a modern way, and if done properly it does not have to be "stuck in the past". The part about that it does not leave room for new UI elements comes down to design. If designed properly the website should accomodate alterations in the same way ant other style might. "Old UI clashing with New UI" comes down to design again. No style can help a bad design.
Your points on what design should be centered around seems to be purely your own opinion. I like my buttons with sharp corners. I like strong gradients where appropriate, I like loud design elements as they help grab attention, and I very much like strong colors. There is nothing wrong with using pure white, as it is in many instances the appropriate thing to use for content, style and design. If the whites hurt your eyes, may I suggest you adjust your screen?
90% of what you said boils down to design. If a design starts out terrible, it will most often stay terrible. It does not matter if it is flat design or skeumorphism.