First I want to start by saying I agree with the OP. +4x8 with a full team end game is easy - zero effort required. While this is fairly obvious status quo the important question for each person is, "Is it fun?"
I agree with many folks throughout this topic. Everyone is just being polite regardless of the actual experience. And some of those folks probably did genuinely enjoy the time. I'm more like you though and there are some TFs that I'm just brain dead following along so that I appear to be participating. There are also times I'm the toddler on a sugar high though depending on what character I'm playing. Bottom line... it's EZ merits. But again begs the question - "Is it fun?"
I agree, IO sets are a double edge sword. But I'd be sincerely disappointed if they were nerfed or removed. While I'm not a true min/maxer I do enjoy tuning my character to my play style. Nothing beats the feeling of getting everything setup the way I want and feeling... Heroic! ...or Villainous depending...
But in many instances I have seen general controller builds being largely useless due to Time to Kill being so low at this point. There are some exceptions to this, as with everything, but broad enough for a generalization. Buffs and Debuffs less so because they do impact things even if they do feel some what superfluous. But still the question remains... "Is it fun?"
You've kinda nailed my experience right here with this last part.
The levels play a big part. As you hit the final stretch you get all those enhancement slots and truly flesh out your character. You start making strides to the pinnacle of power. But I think that's the smaller part of the bigger problem.
The balance in this game is totally lost when you're in a team of 8. All the bonuses, buffs, debuffs and sheer volume of damage is more than any mob can generally handle. But... if you limit your team size to 3-5, something I saw someone else mention in a post as well, then you hit an idealistic medium. Everything feels impactful and nothing is meaningless - especially if you keep the difficulty cranked up to +4/8 even with a smaller team size. Even at level 50 with everything maxed out, you'll strain yourself a bit to keep up with an encounter designed for a full team. Speaking from personal experience, it feels great regardless of what level I do it at.
If you haven't guessed by now the reason I kept asking the silly question, "Is it fun?" is that this issue is LARGELY subjective. Some people care, some don't and many more probably aren't even aware of it. The Homecoming team has brought a great boon to us by granting us all a chance to play again but, in short, it's ultimately up to us to make it fun.