Hmmm, hi bigguy. I think what is being said here is largely true but needs quantifying.
I can only assume some people here have been riding some genuinely rubbish hybrids. I have several bikes but my hybrid is a Marin fitted with 28c Panaracer Pasela tyres, a longer, lower stem and a rigid steel fork. Suspension forks are utterly pointless on any road bike and tend to make then horrible to ride. It's about 2-3kph slower than my road bike. It also rides mich better than any road bike I've been on and the frame is aluminium. You can talk about steel all you like, it's the geometry of the frame, the longer wheelbase and the air and rubber underneath you that makes far more difference, then having a good saddle, bar grip and gloves etc. I've always believed those who extoll the virtues of steel massively overstate their case.
I also have a Kaffenback (which is steel) which is set up as a light tourer/audax. Really, the difference in performance is practically nill and it's far more useful than a pure road bike.
As a bigger guy myself I'd recommend this kind of bike. I don't see the point of living with the disadvantages of a typical road bike. Low spoke count wheels are not that commute friendly and will tend to break spokes. Why bother when a decent 36 spoke will be bomb proof and not necessarily much heavier? Road bike gearing isn't ideal for commuting either, the 28-38-48 is much better than a a typical road set up in the city. another thing that's often overlooked when giving advice to to a heavier rider is that 23c tyres fitted to most road bikes will only go up to around an 85kg rider when inflated to their rated pressure. I use 140psi on my road bike and live with the risk - really 25c or even 28c is better. An audax bike will also take mudguards and a rack if needed too.
What I'd do for now is ditch your suspension fork and go rigid steel - the Kaffenback fork is really flexy and gives a good ride. Then get yourself some 28c Paselas. this is about the most cost effective way for making your bike faster for the commute and still reasonably comfy. You'll also shed about 1.5kg of weight in the process too (my marin originally came with suspension and I'd say ditching actually makes it ride better because handling and braking are far more predictable).