Abilities that mimic other abilities for champion concept, what do you think?

Hey there! Pretty much what the topic says! I am posting this question here because it is about champion concepts and an ability that goes along with champion concepts. Mine included. I wanted to get a feel of what people thought on the subject before posting the champion and people just focusing on that ONE ability and not giving the champion ANY credibility at all because of it. Much like what has happened when posting champions with similar abilities and or appearances of other people that I had NO idea existed (Take my Champion Ilidon, the First Demon as an example. People automatically didn't like him because he apparently looked like this guy Illidan Stormrage as well as apparently sounding like him when I had NO idea he even existed, and I don't even think they are similar except in the close sounding name and the ears. Other than that their weapons are different, my guy is more humanized and grey skinned, wings are feathered and not demonic, and his abilities are different from what I can tell, but that's besides the point!).

So, now that I explained a few things what do you guys think of abilities that mimic other abilities?

My ability I have planned out absorbs spells and projectile abilities (Ultimates included but still do damage, only reduced damage) and then mimics the base damage and properties of the absorbed ability using my characters AP as an addition to the base damage as well as the Rank of my characters ability to determine the rank of the ability absorbed. If that makes ANY SENSE when reading. For example, my character absorbs a rank 5 skill, but his rank for the absorb is 3. That would make the absorbed spell/projectile ability a rank 3 form of that ability. Not the rank 5. This absorbed spell or projectile ability then can be used by my character by activating their skill again that absorbed the spell and or projectile ability.

So! Let me know. Is this a good idea, or is this something people DON'T want in a champion EVER. Let me know with the poll and your feedback! If answering yes, please explain to me a good way to make it balanced so it could work. If answering no please explain why. Whether it is personal, game breaking league wise, etc. It would help me a lot! Thanks! ^_^