、。
It must be a relief not to have to study so hard.
Literal
Intensely study-not-[even-ても] finish-[that-とは], is-pleasant-[emphatic-ね].
A tangled-looking but informative sentence. 猛烈に ('intensely, furiously') is adverbial. ~なくても (the concessive negative 'even without X-ing') combined with 済む gives the standard 'manage without X-ing' frame, in present tense. とは is the topicalising-exclamation 'the fact that X!' — expressing mild surprise, approval, or emphatic topicalisation. 結構 here means 'splendid, fine, nice.'