here's the thing about that though, sure there's a lot of "basic" metal as you like to call it out there. its the riffs that matter to me, like i said.
i've listened to plenty of hyper progressive "OOO LOOK AT HOW GOOD I CAN PLAY MY INSTRUMENT" types of bands. Dream Theater is a perfect example of how to be incredibly good at music and still write shitty songs. Another example is the new Faceless album "Autotheism," a big step forward for them in terms of 'instrumentality' but a massive step backwards in terms of songwriting ability.
There are bands that can do the crazy time signature thing well, but there are many more who simply cannot. I find music like that masturbatory. At first it was cool to hear it, but after hearing so much of it, i feel like the guitarist is just jerking off all over the listener's face. I am not impressed by such things anymore, and thats the perfect segway into better explaining my stance.
Bands like that, or rather, many of them, since as we both know i am generalizing here. Bands like that take elements from the core of death metal, like a sweet riff or two, right? Then all they do is play a couple sweet riffs and then go DEEDLEY DEE and switch their time signatures around a lot. Just as how you say that you find old school death metal formulaic, i find your music even more formulaic. Here is the formula: riff - breakdown - guitar noodle - repeat. They have taken the element of death metal that makes it fearsome (The Almighty Riff) and they have turned it into something empty and meaningless. Additionally, all of these breakdowns and technicality have ALREADY BEEN DONE, many years ago, by obscure metal bands that were never able to make a name for themselves. Then along came some bitches who ripped off their style and got popular doing it twenty years later.
here are some bands from ages ago that i believe do a much better job at being techy.
1988 - Aspid - a technical thrash masterpiece that is the obvious inspiration for many tech-metal bands that arise in the future
2004 - necrophagist - some people hate them, but i think they do a much better job at techy-dm than any of the deathcore bands,
1990 - nocturnus - one of the first technical death metal bands, still considered a masterpiece by many