True, that's a real pain in the ass, to switch the ingredients needed for every friggin' potion you brew.
If you want to make your new playthrough maximizing Alchemy, be sure, as soon as possible, to get Mutation AND Amplification, max them out, then decide which other talents you want to max out. I even left out the trap/bomb talent, and I'm kicking asses the same, I can't imagine what I'd be able to do with 2 more points in that talent.
If I may give you another advice, just avoid the Taster talent: it gives you the possibilit to drink another pot (so 4 max), BUT your max intoxication is still capped at 100, so unless you plan to use always 4 pots with 25 Toxicity each, it's pretty useless.
vAddicatedGamer: Btw does anyone find the 4-th potion slot useful? The useful potions usually already add too much toxic.
Lol, I just anticipated your question while I was answering to Slacker about the Taster talent. :D