
Writing this now that Drowned City is out because Wilson got a pretty significant boost.
Wilson's biggest problem, aside from a terrible statline, is that tools don't have any synergy with themselves. They're generally meant for specific builds. Things like Lockpicks require high int and agi. Old Keyring requires the survivor recursion suite, namely Scavenging. Mariner's Compass requires resource manipulation. Microscope requires an evasion focus, etc. There are very few tools that can stand alone that you would want to build an investigator around.
The two big exceptions are Chainsaw and Fingerprint Kit. Three damage/clues per action is absolutely worth building around, even at the high cost. As a guardian, Willy has access to the most Supply-boosting cards with Cleaning Kit, Venturer, and Stick to the Plan to hold an upgraded Emergency Cache. Running out of supplies is not an issue, even without survivor recursion or seeker card draw.
To seal the deal, Drowned City added Nose to the Grindstone, a card so Wilson that he's on the card art. In addition to the skill-agnostic +2 every round, it means that you won't waste supplies even on an autofail. You can actually gain supplies by failing attacks with the chainsaw, spending 1 and getting 2 in return.
In addition, DC added Anchor Chain. Previously, your only options for evasion were Fire Extinguishers that exile themselves, expensive Flashlights that occupy valuable hand slots, and at level 0, only the underwhelming Impromptu Barrier. Anchor Chain provides effective 5-skill evasion in a reusable asset, can exhaust enemies for two turns, and has the option to pitch it from your hand as an event. If you draw it early, equip it to hold you until you get it set up. Once you have your Chainsaw and Fingerprint Kit, use it from your hand as an event. It never stops being useful, even if you don't have the slots.
To flesh out the suite, Tinker lets you dual-wield a chainsaw and FK for every situation. Tool Belt similarly lets you swap between them; less efficient than Tinker, but you can replace the attached asset if it gets discarded or you manage to run out of supplies. Fine Tuning lets you use your Fingerprint Kit twice per round, though you'll probably sweep locations clean with a single activation anyway.
Finally, if you want to play support and can spare yet another hand slot, Pocket Multi Tool with Spring Loaded and Detachable is extremely handy, and Fine Tuning lets you use it twice per round.