About the 'it' is because 'u' is like the neuter gender ending.
I guess you could also have Te and to.
You could, but like I said, the pronoun system feels too schematic already.
I was also thinking about having noun genders: things mainly used my men, things mainly used my woman, and things used by both. masculine, feminine, neuter.
In natural languages, gender assignment is pretty arbitrary. Since you like Romance languages, you must know of examples like la polla
and el coño
I also like the French way of combining vowel sounds. Like, Je aime- j'aime. Like I did with my singular pronouns.
In most languages, there are definite rules for which vowels drop and which vowels combine. In French, for instance, shwa is always dropped next to another vowel. Other vowels can be lost in particular combinations, e.g. tu es
[tɛ]. (Probably because es
can be stressed under certain circumstances but tu
never is.) But French also likes to insert consonants to keep vowels from running together, e.g. et on
> et l'on
, y a il
> y a t-il
[formal] > donne-moi-z'en