If there are people who had actually watched him and thinks he is not the quality that we need, fair enough. But just take a quick look at the posts here and you will see that a lot of people doesn't want him because he is from a relegation-threatened team, doesn't score enough or simply isn't as fancy a signing as Dybala, Vietto etc is.
Well I'm no one to judge whether they've actually seen Ings play on a regular basis but they do have a point.
Not a rule of thumb, but it's incredibly rare to find quality players from relegation threatened sides, hence why not a lot of big clubs indulge in the practice just to make up numbers. Names like Keane have been mentioned but that was a long time ago, in a totally different era of football where the disparity in quality between the 4-5 best sides to the bottom feeders wasn't as stark as is now and teams like say West Ham churned out talents Carrick, Ferdinand and Lampard on a fairy regular basis. Remy ? He has been quite mediocre for Chelsea to be honest. We should be learning from the mistakes and poor transfer dealings of the teams around us and streamlining our club policy, not trying to emulate them by signing players who won't add a whole lot to the squad in the medium and long term.
That he doesn't score a lot is a fair argument too, 9 goals from 29 matches and almost 2500 minutes of play is hardly a spectacular output for a striker who doesn't add a lot of creativity in the final third to make up for the deficit. Players like DJ Campbell scored 13 goals in recent memory, Odemwingie scored 15, Yakubu 17, Cisse 13, Holt 15, Michu 18 and so forth. Do any of them scream Manchester United, even as squad options despite superior return to Ings' ? We have a perfectly talented player in Wilson who can be the 3rd option behind Rooney and presumably Van Persie. Why bring in an average player who'll just eat up Wilson's minutes and slow his progression when Wilson's a good, homegrown prospect who has already been earmarked for success by Van Gaal and Giggs ?
Also, while Dybala or Vietto might be fancy names, firstly they've evidenced more quality this season, and I'm pretty sure most of the posters on Caf aren't averse to potential signings like Sterling or Stones or Kane and other top shelf English talents that can progress into world class type of players or atleast become highly productive members of the squad. It has nothing to do with being English or boring, so let's not be presumptive about it. Their main emphasis should be on buying players more in alignment with our stature, rather than snapping them just because they're free or have had a few decent performances here and there. That's how you end up bloating the squad with likely non performers. If we are to sign a good English player to augment what we have, rather Berahino who more skillful, productive and can develop into a better player than Ings. The primary objective is continual improvement of the squad, not penny pinching and ending up with the lesser talent just to save a few million (which is a bit inconsequential for a club with United's revenue anyway).