Current state of support items
Season 1 support veteran, got to gold back in S1 with just Soraka and i've been playing supports since then.
Long ago, back in 2013 there was huge nerf to base utility stats to all supports where they added AP scaling. This was to promote BUILDING AP ON SUPPORTS, so SUPPORTS CAN GET POWERFUL WHEN AHEAD. What we got nowdays:
AP support-oriented items



Tank support-oriented items

11/16 items have HEALTH/MANA REGEN on it, which are completely irrelevant stats in combat scenarios 12/16 items have CDR. Stat that doesn't improve their power alot, especially power of their ultimates. It's extremely easy to get huge amounts of CD from runes, making CDR even worse. 4/16 have AP. These items that do have rather small amounts of it, namely 60, 50, 40 and 25.
You might say "HP regen works in lane, MP regen does work in prolonged fights...". That's true. However, these are percentual stats. They are more effective on certain champions and less on others. Guess what. Supports have LOWEST BASE REGEN VALUES, so they BENEFIT FROM BONUS REGEN THE LEAST OF ALL CHAMPIONS. To make things more ridiculous, SUPPORTS HAVE HIGHEST AVERAGE MANA COSTS IN GAME. Janna's Q costs 150 mana, E 110 mana... there aren't even ultimates on NORMAL champions that are this expensive.
Moving on, most expensive support item costs 2400 gold. These items are literally cluttered by "gold sink" stats like CDR and Regens. So not only they are extremely item slot inefficient, they are also extremely gold inefficient. GOLD INEFFICIENCY ON CLASS THAT GET THE LEAST AMOUNT OF GOLD OF ALL CLASSES Slot inefficient items on class WHICH REQUIRES THE MOST ITEM SLOTS BY DEFAULT. I mean, supports have half of their item slots cluttered by mandatory items - Slavestone, Boots and Vision wards.
Next, actives. All of tank-oriented support items have ACTIVES. Few of these actives (the most impactful ones) scale with level. LEVEL SCALING ON CLASS WITH LOWEST AVERAGE EXPERIENCE GAINED These actives are overloaded, and half of the supports would gladly trade their baseline skills for these item actives as their abilities. This makes supports even more boring to play, as every support is more or less the same nowdays. You just build your shiny active items (don't forget slavestone or get reported) and click them instead of your abilities.
So, what about we nerfed the crap out of support items and gave power back to supports themselves? I mean, look at Janna's Q. It's 0.5s knockup with pitiful damage for 150 mana. W is 40% slow for 3 seconds with 12s CD. Seriously? This on a SUPPORT of all things?
I mean, how bad is the situation if SQUISHY GOLD-DEPENDANT MAGES outshine actual supports with their UTILITY AND DAMAGE? I mean, VK, Brand and Zyra can kite much better than Janna while providing substantial damage.
Having to watch "autofilled supports" because nobody wants to play this role is ridiculous. So PLEASE FIX OUR SUPPORTS. WE DON'T WANT TO PLAY NEUTERED SUPERMINIONS CAPABLE OF PURCHASING ITEMS. WE WANT LEGITIMATE CHAMPIONS WITH POWER COMPARABLE TO OTHER CLASSES.
Edit: This might even fix stupid 5v2 bot lane clown fiestas, as it is much easier to gank one legitimate and one neutered champion than to gank two legitimate champions. Mid laner can just roam bot and try to kill ADC without any real risk of being killed, sometimes even in 1v2 situation, just because how bad supports are.