I wish to point out some drawbacks on my own research work after I have praised it.
As a _____, I am aware of my work's drawbacks, which could be fixed if I had more time.
Is there an adjective or noun for this?
You may be looking for literally "self-aware", as in
Bob is self-aware
Bob is a self-aware person
Or, if you want to get really fancy and obscure, try "autognositic" on for size. From Wiktionary:
autognosis: (noun) Self-knowledge; the understanding of one's character and peculiarities.
Using opportunity areas sounds more positive.
As a _____, I am aware of my work's opportunity areas, which could be improved/fixed if I had more time.
Adjectives would be objective or impartial:
Being objective, I am aware of my work's drawbacks, which could be fixed if I had more time.
- not influenced by personal feelings, interpretations, or prejudice; based on facts; unbiased
- not partial or biased; fair; just
"principal" might be a different tack, acknowledging some partiality on the research, but also expertise and familiarity with its shortcomings.