Alchemist SP pots were changed, from 917 to 1288 SP recovery, 30% less weight and 15 seconds CD.
This means you can recover 280% SP of the SP you could recover before Re:build within 30 seconds.
SP pots are cheap by the way. Uosis now drop like weeds on maps because of the mob density increase, and you only need 3 Varnalesa,1 Flask and 1 Uosis for 5 potions.
Since a Flask costs 120 silver and 3 Varnalesa cost 375 silver, each lvl 15 Condensed SP Potion costs exactly 99 silver to craft. If you can’t afford that/are not willing to do so, you’re just a cheapskate.