"i ngrá" does not work here, does it? I wasn't sure and lost a heart for putting it in.
“They love” for Is aoibhinn leo is idiomatic; “They’re delighted with” might be a closer translation.
No, "i ngrá" means "in love", whereas the question is really saying that they like the new edition a lot.
Is there a general rule for when to insert the "t" before a noun (i.e. t-eagrán) and when to leave it off? I got a "typo" for forgetting it.
Masculine nouns that start with a vowel get a t- prefix after the singular definite article in the nominative case. Feminine nouns don't.
an t-úll, an ubh
an t-eagrán, an eochair